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【題目】The palace caught fire three times in the last century, and little of the original building _______ now.
A.remains
B.is remained
C.is remaining
D.has been remained

【題目】 ______ scientists have learned a lot about the universe, there is much we still don't know.
A.Once
B.Since
C.Though
D.Unless

【題目】— I don't understand why you didn't go the lecture yesterday afternoon?
— I am sorry. But I _________ my homework.
A.was doing
B.had done
C.would do
D.am doing

【題目】If you come to visit China, you will ______ a culture of amazing depth and variety.
A.develop
B.create
C.substitute
D.experience

【題目】The workers insisted that they ______ a free lunch every noon, and the boss had to give in.
A.are given
B.being given
C.will be given
D.be given

【題目】— Can you come to a party on Saturday, Peter?
— Oh, ______I'm already going out, I'm afraid.
A.what a pity!
B.don't ask!
C.how come?
D.so what?

【題目】If I _____it with my own eyes ,I wouldn't have believed it.
A.didn't see
B.weren't seeing
C.wouldn't see
D.hadn't seen

A.Confident.B.Worried.C.Sleepy.

【題目】I truly believe ______beauty comes from within.
A.that
B.where
C.what
D.why

【題目】Could you tell me how long ______ the navy?
A.you have joined
B.have you joined
C.you have been in
D.have you been in