—You can use MSN to talk with Vivien on the Internet.— I know.But can you tell me ________?
问题描述：
—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
答
应该是：
1.应该选A
D之所以不对,是因为从句要用陈述句语序
而D仍然是疑问句语序
改为how I can use it 才是正确的
2 应该选C
大卫承诺要过来和我们一起吃午饭.
但他还没有来.我已经单独待了半个小时了.
这里是他还没有来,所以用完成时.