（）

(单选题)My mother complained that my old books were ______ too much (单选题)It seems there are ______ people out of work. Something must (单选题)Don’t speak unless you completely ______ what others say. (单选题)Don’t mention that at the beginning of the story, or it may (单选题)If we sit in ______ front of the bus, we’ll have ______ bett (单选题)______ the heavy rain and flooding, lots of people have been (单选题)As a new graduate, he doesn’t know ______ it takes to start (单选题)The fact that she was foreign made ______ difficult for her (单选题)He didn’t make ______ clear when and where the meeting would (单选题)—I feel very happy that I ______ to be the host.—Congratulat