题目内容:
_______ your valuable help, we couldn’t have finished the experiment ahead of time.
AIf it were not for
BHad it not been for
CWere it not for
DIf it has not been for
答案解析:
_______ your valuable help, we couldn’t have finished the experiment ahead of time.
AIf it were not for
BHad it not been for
CWere it not for
DIf it has not been for