It is reported that China will not buy the Euro debt until some thorough research ______.
#102141
A
will be done
B
had been done
C
has been done
D
will have been done
推荐题目
The students        busily when Miss Brown went to get the book she      in the office.
#101482
A
were writing; left
B
wrote; had left
C
had written; left
D
were writing; had left
--Why has he been staying at home these days?  --He ___________ since a month ago.
#104803
A
has been out of work
B
was out of work
C
has lost his work
D
had left from his work
The roads have ______ because of people’s dependence on cars.
#102583
A
jammed
B
been jamming
C
to jam
D
been jammed