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

She spoke in a very low voice, but I can understand what she said.
A.can
B.in a very
C.she said
D.but

The oil price is believing to be rising again.
A.is
B.be rising
C.believing
D.oil