We () on it for many hours but we have not yet reach any conclusion.
A、work
B、have been work
C、have work
D、are working
A、work
B、have been work
C、have work
D、are working
第1题
A.正确
B.错误
第4题
In 1959 we produced a hundred-fold ______ steel as we did in 1949.
A.more than
B.as much
C.as many
D.doubled
第6题
We saw many mountains ________ with snow.
A.covered
B.cover
C.covering
D.covers
第7题
We hope that as many people as possible ______ join us for the picnic tomorrow.
A.need
B.must
C.should
D.can
第8题
A. but
B. although
C. unless
D. lest
第9题
B.medical association
C.health groups
D.patients
第10题
From the last paragraph, we many conclude that ______.
A.Americas is a democratic country
B.Americas newspapers are responsible
C.the American press has a good reputation
D.the Watergate Affair has been exposed
第11题
A、错误
B、正确