UARFCN定标值为（）A.N=5*F B.N=6*F C.N=2*F D.N=7*

The astronauts were so struck by _______beauty of nature that they took lots of  pictures in _______space.

A．the ; /

B．the; the

C．/; the

D．/; /

A: Mum, _____ I watch TV now?

B: No, you          . You _____ finish your homework first. [ ]

A. may, can't, must

B. can, can't, may

C. must, needn't, must

D. may, mustn't, can

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