21.（ ）

(单选题)—Does he find out the truth?—______. I’m afraid he’s still l (单选题)For years we had little knowledge of ______ life was like in (单选题)They spend a lot of money ______ home improvements to get a (单选题)You know that pools are expensive to build, and so ______. (单选题)Early results indicate that the government will be ______ to (单选题)She takes care of a class and is also ______ the administrat (单选题)At the beginning of the new term, all the students conscient (单选题)Both sides agreed to ______ on building this railway. (单选题)Britain is the only country in Europe that allows ______ to (单选题)Working mothers are used to ______ their jobs, their childre