1. It is hot and dry; the flowers need ______.

　　A. being watered B. be watered C. to water D. to be watered

　　【答案】D 这里是固定用法，need to be done前面的被修饰词与be done的动词是被动关系。need to be done=need doing。

　　2. What __ next will be discussed at today's meeting.

　　A. will do B. to do C. shall we do D. to be done

　　【答案】B 本题考察动词不定式做主语，What to do 是固定用法，此处不定式to do 表示将来要做的事情;如果选A项则没有主语;选择D项则没有谓语;如果选C，应改为 What we shall do ,因为在what, which, where 这种特殊疑问句引导下的问句中做主语时，句子要用陈述句语序。

　　3. My room is a mess. It needs ___.

　　A. to be tidying up B. tidying up C. to tidy up D. tidied up

　　【答案】B。句型：主语(物)+need(want，request)+doing(to be done)，后面用动名词的主动形式来表示被动含义或不定式的被动形式来表示。The house needs cleaning.(to be cleaned)：这房子需要打扫了。The radio needs repairing(to be repaired).这台收音机需要修理了。

　　4. Good medicine _____ bitter to the mouth.

　　A. tastes B. tasting C. to taste D. is tasted

　　【答案】A。主动表被动。

　　5. There are many good films played by Cheng Long that are worth________.

　　A. to be seen B. being seen C. seeing D. to see

　　【答案】C。这有很多成龙演的好电影。Be worth doing值得做某事。