______ over and over again, but he still couldn’t understand.
| A．Having explained | B．Having been explained |
| C．Explaining | D．It had been explained |
相关试题
Being extremely angry, the boy and went out, saying nothing．
| A．turned up | B．turned out | C．turned down | D．turned around |
China’s economic development has made rapid progress in the past years and young people have made great contribution to this progress．
| A．/ ; a | B．the; / | C．a; a | D．/ ; / |
Who would you rather _____ the meeting instead of you?
| A．attend | B．have attend | C．have attended | D．have to attend |
On the table _____ two dictionaries．You may look up the word in either of them．
| A．lie | B．lays | C．laid | D．lies |
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