See the flags on top of the building? That was _______ we did this morning.
#73048
A
when
B
which
C
where
D
what
推荐题目
The argument remains extremely heated there are necessary conditions of existence such as water on the Mars.
#71649
A
that
B
whether
C
if
D
which
After Yang Li Wei succeeded in circling the earth, _______ our astronauts desire to do is walk in space.
#74020
A
where
B
what
C
that
D
How
in the regulations that you should not tell other people the password of your e-mail account.
#72904
A
It requires
B
It is required
C
What requires
D
What is required
The science of medicine, _____ progress has been very rapid lately, is perhaps the most important of all the science.
#70005
A
all whose
B
all what
C
all that
D
all which
一Andrew got injured in the sports meet last week．一Would it be at least a fortnight he could recover and return to class?
#70643
A
when
B
that
C
since
D
before