It’s our duty ____ the room everyday.
A. to clean
B. cleaned
C. clean
D. cleans
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Let him _______ a rest. I think he must be tired after the long walk.
A. has
B. have
C. to have
D. having
It was at 8 _____ I went to bed yesterday.
A. that
B. who
C. when
---My mom is cooking. At the same time, my dad is setting the table. ---替换at the same time,正确的是:____
As
B. The same
C. Meanwhile
---I went to bed at 8 yesterday. ---下列对此句转换的强调句,正确的是:____
A. It is I who went to bed at 8 yesterday.
B. It was at 8 that I went to bed yesterday.
C. It was yesterday when I went to bed at 8.
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