Scientistssayitmaybefiveorsixyears
来源:语文精选馆 3.43W
问题详情:
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
A. since B. after C. before D. when
【回答】
C
知识点:连词
题型:选择题
问题详情:
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
A. since B. after C. before D. when
【回答】
C
知识点:连词
题型:选择题