I) 1, Since: 1991, yesterday, 4.0 p.m, Monday, 1.0 a.m, she was young

   2, For:những từ còn lại

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III)

1, He has had a cold for a week.

2, They have bought the new house since April.

3, My family has been here since Christmas.

4, We haven't seen each other for 10 years.

5, Mr Clack has worked in the bank for a long time.

6, Tom and Joana have gone to France since last summer.

7, My sister has started a new job since yesterday.

8, I haven't eaten in that restaurant for ages.

9, Mr Robinson has taught in this school since 1978.

10, I have written this letter since 6 o'clock.

11, Mr Ha has given up smoking for five months.