He kept smiling secretly and we were all wondering_______that made him so happy．
| A．how it did | B．what he did | C．how it was | D．what it was |
相关试题
When ____ different cultures, we often p
ay attention only to the differenced without noticing the many similarities.
| A．compared | B．being compared | C．comparing | D．having compared |
we should exploit the Antarctic’s natural resources is open to discussion.
| A．What | B．Whether | C．If | D．That |
World Wide Web was invented in 1991 by English scientist ,Tim Burners-lee.
| A．\; an | B．The; an | C．The; the | D．A; the |
What shall we use for power when all the oil in the world has ____ ?
A. given out B. put out C. held up D used up
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