Only recently______to realize the dangers caffeine（咖啡因)might bring to our health.A．that

Only recently______to realize the dangers caffeine(咖啡因)might bring to our health.

A．that scientists began

B．have scientists begun

C．scientists have begun

D．that did scientists begin

请帮忙给出正确答案和分析，谢谢！

您可能感兴趣的试题

It was _____ last year ______ he came to realize the importance of learning English.A

答案解析
Only when you realize the importance of foreign languages _______ them well.A、you can

答案解析
From the passage we can conclude that the U.S. has come to realize______.A．the weakening i

答案解析
______ refers to the actual realization of the ideal language users knowledge of the rules

答案解析
It is important to realize that the same technology _____ helps us may also harm us

答案解析
Only when I began to do it ____ that I had made a mistake.A I realized B I had realize

答案解析
Only recently ______ to deal with the environment

答案解析