1.A powerful earthquake struck Haiti's capital, ________ tens of thousands homeless and buried in ruins.
A. left B. to leave
C. being left D. leaving
答案与解析：D 句意：海地首都发生强烈地震，造成了成千上万的人无家可归和被埋在废墟中。现在分词短语作状语，表示结果。
2．—Be careful! Don't forget you are on a ladder.
—But you are holding it for me, nothing ________.
A. worry about B. to worry about
C. is worried about D. worrying about
答案与解析：B 句意：——小心点。别忘了你在梯子上。——但是有你扶着呢，没什么可担心的。不定式to worry about作后置定语。
