1、The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
A. to be based on B. to base on
C. which to base on D. on which to base
2、_____evidence that language acquiring ability must be stimulated.
A. If being B. It is C. There is D. There being
3、We hadn't met for 20 years, but I recognized her_____ I saw her.
A. the moment B. for the moment
C. the moment when D. at the moment when
参考答案&解析:
1、D on which to base his arguments in favor of the new theory = The professor will base his arguments in favor of the new theory on sufficient grounds. 故答案为D。
2、C 句中有连词that和谓语must be stimulated,缺少一个谓语动词,排除A、D,该句译成汉语是“有……的证据”,而不是“它是……的证据”所以排除B。故答案为C。
3、A 定冠词the加上表示时间的名词起连词作用,引导时间状语从句。如the night/ the minute/ the spring/ the year等。故答案为A。