【题目】I am wondering how it ____ that you did so much work within such a short time.
A. held upB. came about
C. gave awayD. called for
在线课程【答案】B
【解析】
考查动词短语辨析。A. held up举起；B. came about发生、产生；C. gave away 泄露；D. called for提倡。句意：我想知道你怎么会在这么短的时间完成这么多工作。How it came about that?表示“怎么会……？”，故B项正确。