4. 她太小了，不能被单独留在家里。

She is too young to                  at home alone.

3. 医生让他卧床两天。

The doctor asked him to stay in bed for                       days.

2. 医生建议他要多喝牛奶。

The doctor                           more milk.

1. 当我爸爸进来时，我正要做家庭作业。

I               do my homework when my father came in.

5. They are about        (fly) to Beijing tomorrow. .

4. Open your mouth and pronounce the sound       (loud) .

3. She        (fly) to London last weekend.

2. When I entered my son's room,he was busy       (play) computer games.

1. It's important        (not feed) the baby too much.

5. There is nothing in the bottle. It's e       .