Yourbikeneeds_____.You‘dbetterdoirightnow.
A、cleanB
need+to be done或 need+doing 都表示被動的動作。 類似的動詞還有 want，require 等。他們都是后面跟動名詞的主動式或不定式的被動式。
_____he speaks softly is no proof that he is kind.
_____alltherepresentativesstillnotthere，themeetingwaspostponedforseveralhours.
Itseemsasifthesun_____roundtheearthsinceitrisesintheeastandsetsinthewest.
_____you understand this rule ，you‘ll have no difficulty in dealing with such problems.
Your bike needs_____.You ‘d better do i right now.
