Tom, look at your shirt! It requires ________.
| A．washing | B．washed | C．to wash | D．being washed |
—What do you think of the book？
—Oh，excellent．It's worth ___________ a second time．
| A．to read | B．to be read | C．reading | D．being read |
The library needs ＿＿, but it will have to wait until Sunday．
| A．cleaning | B．to clean | C．clean | D．being cleaned |
A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
| A．should | B．can | C．must | D．will |
Sir, you ______be sitting in this waiting room. It is for women and children only.
| A．mustn’t | B．can’t | C．won’t | D．needn’t |
Jack _____ yet, otherwise he would have telephoned me.
| A．mustn’t have arrived | B．shouldn’t have arrived |
| C．can’t have arrived | D．needn’t have arrived |