怎样选择,并说说是那一条语法.

怎样选择,并说说是那一条语法.
4.If you _____ faster,we could have turned in the project before the deadline.
A.work
B.had worked
C.have worked
D.working
7._____ time do you spend on your homework every day?
A.How much
B.How well
C.How often
D.How long
10.Would anybody care for _____ drink before dinner?
A.the others
B.another
C.other
D.others
13.She _____ everywhere for her favorite perfume.So far she hasn't found it.
A.has looked
B.looking
C.been looking
D.looked
21.I had _____ soup and a sandwich for lunch.
A.a few
B.a lot of
C.many
D.much
18.We went to the doctor _____ she couldn't seem to get rid of her cold.
A.so
B.for
C.that
D.because