单项填空
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21．---John, there is _____ Mr．Wilson on the phone for you.
---I’m in _____bath.
A．a ; the B．the ; a C．a ; 不填 D．the ; 不填
22．Of all the books on the desk, ______ is of any use for study.
A．nothing B．no one C．neither D．none
23．--- If you like, I can do some shopping for you.
--- That’s a very kind ________.
A．offer B．service C．point D．suggestion
