II. Put the verbs in brackets into the  " past simple " or " past progressive " tense.
1. When my uncle ( come ) ________, we ( water ) _______ the plants and flowers in the garden.
2. Thu ( talk ) _______ to her friend, Hoa, on the phone at 8 o'clock last night.
3. Lan ( practise ) _______ the piano while her sister ( read ) ________ comics at 7 o'clock last night.
4. The monkeys ( climb ) ________ up the trees when we ( visit ) _______ the zoo yesterday morning.
5. Ba ( talk ) _______ with his classmate when the principal ( enter ) _________ their classroom.
6. Last night I ( make ) _______ a cake when the lights ( go ) ________ out.
7. While I ( cross ) ________ the street, I ( step ) _______ on a banana skin and ( fall ) _______ heavily.
8. It ( begin ) _______ to rain when I ( plant ) ________ some flowers in the garden.
9. When I ( arrive ) __________, the teacher ( write ) ________ on the blackboard.
10. When they ( walk ) _________ down the stairs, they ( hear ) _________ a strange noise.

Complete the sentences with the correct form or tense of the verbs in brackets.

1.      Yesterday, a stranger (call) _________________ our phone number.

2.      We (move) _________________ to a new house two weeks ago, and we (be) _________________ very happy with it now.

3.      (you/ miss) _________________ two classes last week? – Yes, I (be) _________________ ill.

4.      What (you/ look) _________________ for? – I (try) _________________ to find my glasses at the moment.

5.      Khanh usually (play) _________________ football with his friends after school, but yesterday he (not play) _________________ because he was tired.

6.      After three days of rain, the sun (shine) _________________ today.

7.      My uncle (repaint) _________________ the walls for us next week.

8.      With robots around, we can (save) _________________ our time to do other activities.

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.

III.    Put the verbs in brackets into the correct verb form.

     1. I (have)                           dinner when his friend called.

     2. Joan (travel)                             around the world.

     3. We (not begin)                          to study for the test yet.

     4. Don’t get on a bus while it (run)                           .

     5. I (invite)                          them to my birthday party yesterday, however, they (not come) .

     6. Look! Somebody (clean)                    the room.

     7. My brother (begin)                             looking for a job in January.

     8. Timson (make)                         13 films and I think her latest is the best.

     9. She (cook)                      at the moment. That’s why she can’t answer the phone.

     10. She doesn’t mind (go)                      out in the evening.

     11. I (not see)                      him since we (leave)                         school.

     12. Football (be)                           my favourite sport. I like (play)                           it in my free time.

     13. Jane (leave)                            just a few minutes ago.

     14. She (be)                        extremely quiet since her husband died.

     15. My hobby is carving eggshells and now I (carve)                    nearly 100.

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