Gap Fills Exercise

Fill in the blanks with an appropriate verb form.

Exercise 1

What do aliens …………1…………… (watch / watching / watched) on television? Whatever it be, broadcasting ………….2……………. (require / requires / is requiring) the transmission of radio signals. Astronomers in Hat Creek, California …………3………….. (work / are working / have worked) on a giant new array of radio telescopes that they say will be able to capture the radio signals transmitted by aliens if anyone out there ………..4………… (is / was / has been) busy broadcasting.

Solution

What do aliens watch on television? Whatever it be, broadcasting requires the transmission of radio signals. Astronomers in Hat Creek, California are working on a giant new array of radio telescopes that they say will be able to capture the radio signals transmitted by aliens if anyone out there is busy broadcasting.

Exercise 2

Scientists …………..1…………… (think / thought / are thinking) they have figured out the real job of the seemingly useless appendix: it …………2…………… (produces /producing / is producing) and protects good germs for your gut. For generations, appendix ………….3…………… (has dismissed / has been dismissed) as superfluous. Doctors figured it had no function, surgeons ………….4……….. (removed / removing / are removing) it routinely and people lived fine without it. However, the new study …………….5…………….. (suggesting / suggest) that appendix is related to the massive amount of benign bacteria present in the human digestive system.

Solution

Scientists think they have figured out the real job of the seemingly useless appendix: it produces and protects good germs for your gut. For generations, appendix has been dismissed as superfluous. Doctors figured it had no function, surgeons removed it routinely and people lived fine without it. However, the new study suggests that appendix is related to the massive amount of benign bacteria present in the human digestive system.