_____ a certain doubt among the workers as to whether he could finish the task in a short time．
#34562
A
It was
B
There had
C
There existed
D
It had
推荐题目
In some countries, some people don’t even have fresh water or basic health care, reaching the target will be difficult , help from the international community.
#32113
A
where; despite
B
that ; though
C
where; although
D
which; despite
—How long do you think it will be______ man can finally solve the problem of cancer?—Well，it depends
#30976
A
when
B
until
C
after
D
before