It is uncertain _______ side effect the medicine will bring about,although about two thousand patients have taken it.
#32917
A
that
B
what
C
how
D
whether
推荐题目
— Is it OK if I take this seat?—Sorry,___________.
#34157
A
here you are
B
take it
C
it is taken
D
never mind
. The concert was a great success--there wasn’t a single empty seat in the concert hall, ____ it was very cold.
#34181
A
because
B
when
C
unless
D
although
Air pollution is getting more and more serious, so we must take action it is too late.
#31510
A
before
B
after
C
until
D
when
Sorry to say it will be years _______ we really have classes here with only 25 students.
#31432
A
since
B
that
C
when
D
before
Look! Every player in our team is doing their best. It seems ________our team is going to win.
#33438
A
even if
B
if only
C
as if
D
only if