5. ________ her help, I was able to operate the computer ________ myself.

4. Her father is ________ forty.

3. Miss Brown can cook a fish ________ many ways.

2. Mrs. Scott arrived ________ China ________ 18: 00 ________ September 28.

1. Her mother is always busy ________ the housework.

10. She often gets up ________.

a. at six thirty in the morning

b. at six thirty of the morning

c. in the morning at six thirty

d. in the morning of six thirty

B. 根据句意，用适当的介词填空。(15分)

9. In a short while the seagulls ate up ______locusts.

a. two hundred of b. several hundreds of

c. two hundreds d. hundred of

8. When he came back to China in ________, he was already in ________.

a. the sixties, his sixty b. sixties, his sixties

c. the sixties, his sixties d. sixty, sixty

7. The ________ paragraphs need rewriting.

a. first one b. first four

c. two thirds d. one fifth

6. She has a ________ baby.

a. ten-months old b. ten months-old

c. ten-months olds d. ten-month-old