—How long have you been in this office?—Just a few minutes.My cousins ________ here together with me.
#105079
A
have walked
B
had walked
C
walked
D
have been walking
推荐题目
The professor devoted all his life __________ the treatment of AIDS.
#105014
A
to research
B
in researching
C
to researching
D
at researching
(2013·新课标全国卷Ⅱ)The watch was very good, and he ________ 20 percent down for it.
#105097
A
paid          
B
cost
C
bought
D
spent