III. GRAMMAR

Put the verbs in brackets in the correct form. (Viết động từ trong ngoặc đúng dạng.)

a. Everything is ready for your lesson. The board (1. clean)______ and the lights (2. turn on)______  All the students (3. wait)______  for you.

b. If Mary (1. know)______  anything about car mechanics, I'm sure she (2. help)______  us fix the car, but I think she (3. know)______ even less than we do.

c. (1. decide)______ (2. stay)______ at home last night.

I (3. go out)______  if I (4. not be)______  so tired.

Trả lời:

a. 1. has been cleaned

2. have been turned on

3. are waiting

b. 1. knew              2. would help            3. knows

c. 1. decided            2. to stay                3. would have gone out

4. hadn't been