Great changes （） in China since 1978.

单项选择题Great changes （） in China since 1978.

A.take the place
B.took the place of
C.have taken place
D.have been taken place

1.单项选择题Electricity （） by the Greeks a good many years ago.

A.was first found
B.was first discovered
C.has first been discovered
D.was seen first

2.单项选择题Before she left on the trip, she（） hard.

A.trained
B.has trained
C.would trained
D.had trained

3.单项选择题You（）to lock the door at night.

A.should
B.ought
C.must
D.shall

4.单项选择题-- Hello, could I speak to Don please? --（）

A.Who are you
B.What’s the problem
C.Are you Jane
D.Who’s speaking?

5.单项选择题It is very convenient（）here.

A.living
B.live
C.lived
D.to live

6.单项选择题The song （） by children.

A.is   often sung
B.wa soften   sung
C.sings
D.has   often    sung

7.单项选择题— Nice weather, isn't it? ---（）

A.I’m not sure
B.You know it well
C.Yes, it is
D.Yes, it isn’t

8.单项选择题When we were having a meeting, the director（）the bad news by telephone.

A.was telling
B.was told
C.could tell
D.would tell

9.单项选择题The medicine （） cool, clean and dry.

A.must   keep
B.must   be   kept
C.must   be   keep
D.must   be   in

10.单项选择题“Must we start the experiment now?” “No, you （）.”

A.won’t
B.needn’t
C.can’t
D.may not