Scientistssayitmaybefiveortenyears
来源:语文精选馆 2.85W
问题详情:
Scientists say it may be five or ten years ______it is possible to test this medicine on human patients.
【回答】
before
知识点:连词
题型:单词拼写
问题详情:
Scientists say it may be five or ten years ______it is possible to test this medicine on human patients.
【回答】
before
知识点:连词
题型:单词拼写