题目内容

Einstein’s most famous theory is _________ we call the Theory of Relativity.

A. what
B. that
C. which
D. why

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My suggestion was that the meeing ___________ till the next week.

A. to put off
B. be put off
C. should put off
D. was put off

___________he is living now is not known to anybody.

A. When
B. If
C. Whether
D. What

_ I can’t understand is _ he changed his mind .

A. That; that
B. What; why
C. Which; how
D. That; why

Tha’s ___________ the Party called on us to do.

A. why
B. what
C. how
D. that