Question

【题目】—What's the matter?
—I'm having trouble_____ who has taken my book.
A.looking after
B.looking for
C.looking up
D.looking out

Answer 1

【答案】B
【解析】句意：—怎么回事呢？—我在费劲地查找是谁拿走了我的书。考查动词短语辨析。have trouble in doing sth. 做某事费劲。A. looking after在照顾；B. looking for在寻找；C. looking up在仰望；D. looking out在留意。根据句意和语境，可知选B。