7.21 In these sentences the verbs are underlined. Are they right or wrong? Correct the verbs that are wrong.
1. Tom arrived last week.
2. Have you seen Pam last week?
3. I have finished my work
4. When have you finished your work?
5. George has left school three years ago.
6. Where’s Ann? – She’s gone to the cinema. 7. Have you ever been to Britain?
8. The weather has been very bad last week.
7.22 Put the verb in the Present Perfect or the Past Simple.
1. My friend is a writer. She (write) many books. 2. We (not/have) a holiday last year.
3. ___ (you/see) Alan last week?
4. I (play) tennis yesterday afternoon.
5. What time (you/go) to bed last night?
6. ___ (you/ever/be) to the United States?
7. ___(wash) my hair before breakfast last morning. 8. When I was a child, I (not/like) sport.
9. Kathy loves traveling. She (visit) many countries.
10. John works in a bookshop. He (work) there for three years.
7.23 Choose the correct answer.
1. Detroit Motown in the past. a) was called
b) is called
c) called
2. Detroit as the first capital city of Michigan, but now Lansing is the capital city of Michigan.
a) chosen
b) was chosen
c) has chosen
3. The university of Michigan is one of the best universities
in the United States and it in Ann Arbor. a) located
b) location
c) is located
4. The results by that scientist.
a) check
b) checking
c) were checked
5. All these questions by the students during the
seminar.
a) will discuss
b) were discussed
c) have discussed
6. The binary numeration system in various
computers. a) uses
b) is using
c) is used
7. The binary numeration system by Leibnitz.
a) was introduced b) has introduced c) introduced

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