As we all know, China is a developing country, _____ attracting more and more foreigners．
A． the one B． one C． it D． that
The beautiful town, _____ we spent our summer vacation last year , lies at the foot of a mountain．
A． whose B． which C． where D． why
—It’s such a beautiful day． Why not have a picnic with us?
—_____． But I have a lot of homework to do．
A． Don’t mention it B． It’s up to you
C． I have no time D． I’d love to
—Listen! There is a knock on the door． Who _____ it be?
—It must be Jack． Just now I sent for him．
A． shall B． can C． must D． might
—What made her so happy?
—_____ her son passed the driving test．
A． That B． Because C． Since D． When
I would have come earlier, but I _____ that you were waiting for me．
A． didn’t know B． hadn’t known
C． haven’t known D． wouldn’t have known
