--QQ，as a means of communication，is quite popular among us and costs less than the traditional forms．
--______________．
| A．So is WeChat | B．So it is WeChat |
| C．So does WeChat | D．So WeChat is |
Prices of food in that area ____ sharply since word came that the war would break out soon.
| A．were cut down |
| B．were rising |
| C．have been brought down |
| D．have been going up |
Rather than ____ on a crowded bus, he always prefers _____ a bicycle.
| A．ride; ride | B．riding; ride |
| C．ride; to ride | D．to ride; riding |
______ Marx's works with Engels', and you'll find many differences．
| A．Comparing | B．Compare |
| C．To compare | D．If you compare |
—Guess what？ I have got A for my term paper.
—Great!You _______ read widely and put a lot of work into it.
| A．must have | B．should |
| C．must | D．should have |
It is a rule in his family that ______ comes home earlier should cook the dinner for the family.
| A．Anybody | B．who |
| C．who that | D．whoever |