--How about the book you are reading?
--Good indeed. It ______many problems we have come across in our study.
| A．contains | B．covers | C．refers | D．concentrates |
You’d better put a cloth over the salad to ______ the flies for the sake of health.
| A．keep off | B．keep out | C．help out | D．hold out |
You'll have to be patient ______ my mother ----she's going rather deaf, which ,after all，also makes her badly cut ______.
| A．at; up | B．with; up | C．for ; down | D．on; off |
With science and technology advancing, plentiful kinds of medicines are being developed to _____ us of our pain caused by diseaese.
| A．cure | B．remove | C．relieve | D．reduce |
Farmers often employ fertilizer or other special chemicals to _____the growth of crops, as is well-known.
| A．accelerate | B．advance | C．quicken | D．promote |
----Do you really insist on going out to watch the football game?
---- I know it may rain. ______, I shall go out, nothing can stop me.
| A．Somehow | B．Therefore | C．Anyhow | D．Otherwise |