69.– Are you sure you have to?It’s been very late. -- I don’t know ______ I can do it if not now. A.whereB.whyC.whenD.how
问题描述:
69.– Are you sure you have to?It’s been very late.
-- I don’t know ______ I can do it if not now.
A.whereB.whyC.whenD.how
答
D how后面必须跟it/them作表语 前三个后面不用加
答
C
如果现在不做,什么时候做
答
c吧 句子成分完整 主要是根据句意选.if not now 如果不是现在的话 所以前面强调时间 应该是c