I it to him if he didn’t understand.
| A．shall explain |
| B．will explain |
| C．would explain |
| D．explain |
Not having promoted the new digital camera successfully, the company should ______ its original marketing methods.
| A．account for | B．reflect on | C．work out | D．call up |
Sometimes smiles around the world ______ be false, hiding other feelings like anger, fear or worry.
| A．must | B．would | C．should | D．can |
Was it not until you began to write ______ you should have remembered more words?
| A．did you realize | B．that you realized |
| C．did you not realize | D．that you didn't realize |
In his lecture, the professor referred to the belief, in contrast to all other countries, ______ the elderly are wise, ______ is particularly dominant （占优势的） in the Chinese culture．
| A．that; that | B．that; one that | C．which; which | D． that; one |
--- I saw your uncle take a taxi to the airport. Why didn’t you drive him there?
--- I ______. But my car ______.
| A．would; was fixed | B．would have; was fixed |
| C．would have; was being fixed | D．did; was being fixed |