Your bike needs_____.You ‘d better do i right now.
A、cleanB
need+tobedone或need+doing都表示被动的动作。类似的动词还有want，require等。他们都是后面跟动名词的主动式或不定式的被动式。
Itseemsasifthesun_____roundtheearthsinceitrisesintheeastandsetsinthewest.
Mywalletisnowheretobefound.I_____itwhenIwasonthebus.
_____youunderstandthisrule，you‘llhavenodifficultyindealingwithsuchproblems.
_____hespeakssoftlyisnoproofthatheiskind.
Copernicusmaintainedthattheearth_____roundthesun.
