Question

The young trees should______ as often as possible.

A．take care of	B．be take care of
C．be taken care of	D．be taken care

Answer 1

C

試題分析：這些小樹應該盡可能的受到經常的照顧。結合語境可知句子主語是動作對象，故用被動語態。選項B需變成過去分詞，選項D缺少介詞of。故選C。
點評：此類題型主要是確定句子主語與謂語動詞的關系。如果是主動關系則用主動語態，反之如果是動賓關系，則用被動語態。