Using the Present Perfect Tense (2)

For each of the following sentences, choose the correct present perfect form of the verb.

For help with this exercise, see chapter 25 of Real Essays 5e.

Example

  1. Current events (to reinforce) my fear of flying.
    1. reinforced
    2. have reinforced
  1. Question 1.278

    LR8qKg1KI6ohoJYiVnXfIdYnHHlcpWm4FYDPnfjX1oe65fSleJTDd/7BjaibWkNcjHmbKIzbLJleXvgu8km/WS8VgBmcFWwgdYJaHD9O8PhwkEjfyj6odKEwE5qOoam/SpXCei8gacRFDxzIaLRTX4cTTmZNST/L3rLq/DSQjN0TnTW6w2M9mELfXKGgypxUlx31/ZNbnCXoBi+om5ypavdzhTprg9c2xJFSIK5OSsGK3PM7zfA1aTGS3coYRQURsTB1rzTUdn0dEgRBhpv0V5bA/dS68eG5xtovUJK3K8mmaGRuS7+3jWXaxnCtsI/YKLA474Mv1ZY=
  2. Question 1.279

    YXiOMyrhYl0s5TFgyT7Q/eLEUyDJ5l0woOv3GM1km5aj8UoEAGTRGHjYdqJ3up/+rEc96XTDNLCDY5WyRszvHwsMN5pKlg2aYE8eqkjeREwNTEbWlsPEEk7hfiqgFdfUfxOJmJVl6+RaFNIyUsVfQFGGGCclfQbbvydqUF3LQNxXt8gZL1pXWGTxei0gmtkJj0YZhR0oayRFLWmdAzLVizg5bXPPPMODusfp2DpSdxkw9tqGuIUEEsRVNgF37Z1IPUgIuK9YSHwvRH3Ntc59x0bBWIozGSU7rwOxNnhg4LvKiprI/EX9JOv1Wa1e9qK8XZ2+SAiPvVpvLGWIT+LMH3Txv7qvcOhWMoARuA==
  3. Question 1.280

    eF0eKQVqD6MH4KO8tq/LAXoqaMO3xuR+r570X0WcHsg1EajnbIzqf1PZCWtmneq6MCl4wMtp5GyiK+m6dnZjR5FlBVpAmgLUpy0vbHLkFXRyQVplDsuMpIV346r9UBmk99HxChtCw4fDfiJuZvxx5WP6d80u7Blav7AM8GHnVujrWtLAuCNaRlum+JEgC97wmAZCQAqJN++eUoKw0rwKG0DrI7w0iaHO+xjeP0jI6t1KQOQ05h/8izfjyJEFF8ciWavv8LPaKWliZwPlbRUYIZHE/VbG7gLzbITMGZHq8r+xVek40/Ry96Yco1NjrliumPqSXFmMQuOf10km
  4. Question 1.281

    Ww0Ywhl4n1kivOKZZdfzg06yjQ8iu7GBWH23L2fBOucRjadoCjjDfilgreDywibRbXlYyx5o2EGJpiNQYB/BtH3E17qoo7zuS2Gx51Xe+XNZ4ZrzWNTkuQugs7Z/nKrmcJ5RNArxbbed9xA72f+0wXtcfJE9iwGJ+sad+taQmbtn5sNlf5llXA0DMQJtIJNp1UwPlgQ9rZfXeQ4y78qYjgLOmXZQoPJMzXLy+PUl2DWHrqANzrL/IbI7SqS7FERM8B0gCQfJyHZrjDML2AvpokU5Do7e5mWrZEfnHIYl8PvyPRdl
  5. Question 1.282

    P+DMIwB0LTlSk+u9YoDMAjYr/5lYiKeadGhEbQvKyPEOf3XN/031/w2yp2LcNLbBZLTWTUsil9cWPSIN69/y3v0tDWV/t0kNKUt7GY6q+7vaQDEOp1WZ+pCXP+L9hyHoNCAXy1EyIy6I2yhTgGT9kzWJ49pgJ8ALYOo+5yxOwX1M+6lYf4DiUa6nD4NUc0xpXIdzwIGh3fAQOcict3tWfTTw6D/SqTAqLA7tNwEN6qMPy6iIq5aUGUpu1BSYKPz7pfbodRIY7O7lFTlm4DWNKZ3trCntQI4NnaOUFu0p167ixaBhQDoe3DDqDwD4u8sK4dJefdwQDgHxmGDHX4/KOb/jr1DSERgvpFBNyw==
  6. Question 1.283

    zxWJ7pLqCQiVUrm/TbhU2GssyFzPjBey/11e3eJQTE+oGDQrweW3jPuchUxbQQYRzIaLWa3I5DidbU5vJ4DhiB9yV7GT/ViiFBXDus55p0NU/UbtvBUN/YU7hFUFPwHKCsvLAe1v9ofJyTIjg8rCKuywO4Ppz3dDqzg7JDospu55ZPKtmVmsgsWDr2//+a+yXKc32y8rruqwKVzbxja918yz8ftZKKf0PPYXJZRoDUrIBOPJzqx/++FdVzpJ5PnlYPDfskzndjWZFQ5r2aWrNx562G0TYfEjFm9HNzhzNCHIsEexRg1c+Qv+JW1k0BIKu4caB1vYMwHBQfh1
  7. Question 1.284

    LtuFYhvs8QNzNEqnpe9Q/Sxk3dGbFJLL4dKQUE0BeNob0FizyYcfZEV/d6RXZey5Uh+zZPmWYSdFO1qt1uGmB/M+lgOAChtc/aZokSLHYmJ18ycTKA/uPGoXZVk1v92NVFnU46LPe6HhEL5IEU2QAp4yj5Qg8SBqAEsFjAGe1RDWQjEkFszpOdK+5/4vxYJIkhvcOJjOFvB/urzE5Ol2+MvLl091g/VcaTAsfzYw3bDHV3y3o4B1wuOWpQrGShYD/EXLiT6AuIPfVg8HOVHDmcbUIJewhN0rNFjBvJvbUKdHZyHM+lTBusHlVaFZykoQJlWyh0HaocOJoc9xVpwKnRFywaBLmOB4qObsI/uWW7aNTrUy2P2EXg==
  8. Question 1.285

    hYDDsaxSSXbfmTFBJ0WtEDOTFovPFDXtIYy9V9cHhQQ3grCRWBs7UIOKC2spPZx0pCgLeUw9NsSiYAfNY9nDnNyUWrLkQ8AsHueJSNji/Y602FlY8x9BLNuubKnbK73yGJnMA53JMjpA5mU7Dl0jXpegwjgjHa1zlapgHTKHV0rGv0gs5gGt2nzECNmoVyWJQdekievJrc6hHgeFqzAA5nH3AiJgjBddqu2d3CnEsuKhl47DoDpQxoOuhl0aZkN6B2GMiSRsnIFglYBECbAeciQKvOyj35r0qgpyzp+4RHIkYPoCH94OFk/ZB8lwZYpApS/Paw==
  9. Question 1.286

    s8kmpsLXoZgEBujbR2ambweiTY5uwQRIend4cytQ/xYEZriZL4JYIq5fkWLOfL8lavZeEiRwtbuUehZku8Q98yYdAk87irS1HRnK7R85WBLmqquDs0jwPqcDOqUcLH2iVw2MnPVX5vNp0mAwmLoHZHsbGbkj+rkMNrShyo7xvgN1lbWf26solEmR6Ssibd5DUvtuP+RoaWduaJVJn2/Zvu9kKVN5KtyXzdLWHupPn3OtDePBvhH87YuO5D4pr6Dus6iTIyFN6h8t4zgyj+o4hm7tXpJGRk8QVBRm598ksELmQ2gFkqvl/Q==
  10. Question 1.287

    nVF7+FF5d7XQ95JzKmFtrTMNmqKK4tykH5homjM3e6VYTk8rH234gUhZwvHSiZj9X35NXqLMr+10e+FEOgC7y/0WGAJ8QUQs4avNI1WoUswTWHDRS0mcolQz0OFaNkaW5uy+/U2W1/M6e5GRU1fd/P8/QoKmwPcUDRGMHHTMpvVLXnp8L4M5aiqWPVFUeRid1LQEefyi2xyIwUYxsscqv5eBYFZYfsoSIcQKTSl51EYGxR9f1J7Aem4VywTmyURCp4qBhfIcEsHfwxjsL6PjGA8/jgpGn0CKxC7jMgelCGL/t0PTVQR5TsmsZSRs9v7Hk7prkk8IqOOmgUOg4Iv1g9TcCSXYvWpmtMCcDmG/UbvtU67P