V. Verb forms and verb tenses

Complete the sentences with the correct form of the verbs in brackets. (1 point)

26. Ben _________ (tidy) his room yesterday. 

A. to  tidy                          B. tidies                      C. tidy                            D. tidied

27. We _________ (not/watch) the film on TV last night. 

A. didn’t watch                 B. don’t watch           C. doesn’t watch             D. do not watch

28. Where _________ (be) Freddie and his brother at one o’clock this morning?

A. was                              B. were                        C. wasn’t                        D. weren’t

29. We _________  (have) a great time at the party last night. 

A. has                               B. have                        C. had                            D. hadn’t

Complete the article below with the correct form of the verbs in brackets. Use the first conditional. In gaps 4 and 6, use a modal verb to make the prediction less certain.

Some animals, like lizards and worms, have an amazing ability to grow new body parts if they lose them. Salamanders can grow new legs and some worms can re-grow every part of their body, including their head! If scientists ¹___________ (can) discover how this happens, in theory it ²___________ (be) possible to re-grow human body parts too. Very few scientists are working on this problem now, but if governments ³___________ (start) to spend more money on research, then this dream ⁴___________ (become) a reality. Amazingly, some worms have no limit on lifespan, as they continually re-grow their bodies as they age. So if we ⁵___________ (learn) to repair human limbs and organs, it ⁶___________(be) possible to prevent us from dying. But that is a long way in the future.