单项选择题
A.working B.to have worked C.to work D.having worked
Nobody knows how long and how seriously the shakiness（...
单项选择题Nobody knows how long and how seriously the shakiness（不稳定） of big businesses will （） down the economy.
A.put B.settle C.drag D.knock
I tried very hard to persuade him to join our group but...
单项选择题I tried very hard to persuade him to join our group but I met with a flat（）
A.accept B.agree C.refusal D.decline
Our department（）courses in several foreign languages.A....
单项选择题Our department（）courses in several foreign languages.
A.accepts B.considers C.offers D.takes
