____, please paint the windows before you leave.
A.Unless you can have enough time
B.If you have enough time
C.Unless you have enough time
D.If you’ll have enough time

_____________, he would accompany you on the piano.
A.because he were here
B.were he here
C.Supposing he were here
D.Both A and C

She said if she _____ that the traffic lights were red she _____.
A.realized/ could have stopped
B.had realized/ would have stopped
C.had realized/ would stop
D.has realized/ stopped

There are only a small number of Siberian tigers in the wild.
A.nature
B.life
C.extinction
D.Earth

Choose the correct answers to complete the following sentences.I would have visited you before if there _____ quite a lot of people in your house.
A.hadn't
B.hadn't been
C.wouldn't be
D.wasn't

If you had caught the bus, you _____ late for work.
A.wouldn't have been
B.would have been
C.wouldn’t be
D.would be

If I _____, I would express my feelings.
A.asked
B.
C.would ask
D.

If _____ as I told her, she would have succeeded.
A.she does
B.she had done
C.she did
D.she has done

I think you …………… better not tell him the truth
A.would
B.had
C.should
D.will

Choose the underlined part that needs correction. Protecting the environment is the duty of people live anywhere in the world
A.anywhere
B.live
C.is
D.Protecting