—You can use MSN to talk with Vivien on the Internet.— I know.But can you tell me ________?
—You can use MSN to talk with Vivien on the Internet.
— I know.But can you tell me ________?
A.when I can use it B.what I can use it
C.why can I use it D.how can I use it
答案给的是A,但我想明白为什么D不是对的.
— David promised to come round to havesupper with us today.
— But he ____.I’ve been alone for half an hour.
A.won’t B.hadn’t C.hasn’t D.doesn’t