The boy is too fat because of ______ too much. [ ]
A. eat
B. eating
C. to eat
D. ate
答案:B
.He suddenly saw what looked like a snake in the darkness. For an instant his heart seemed to stop ______.
A.to beat
B.beating
C.beaten
D.being beaten
怎样鉴别滴虫性与假丝酵母菌性 * * 炎?