They ________ often _______to be careful before _______the road.
A．a(chǎn)re, told, crossB．a(chǎn)re, told, acrossC．a(chǎn)re, telling, crossingD．a(chǎn)re, told; crossing
D
D“他們經(jīng)常被告訴過馬路時要小心。”，根據(jù)句意得知，考查的是被動語態(tài)。before在此為介詞，后加doing，故選D。
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