—Are you going to stay overnight? —Not _____ it’s really necessary．
#32423
A
unless
B
if
C
until
D
since
推荐题目
There’s no way of knowing why one man makes an important discovery another man, also intelligent, fails.
#30827
A
since
B
if
C
as
D
while
The students of the music school study ____.
#31664
A
music but also some other subjects
B
some other subjects as well as music
C
no subjects but music
D
neither music nor some other subjects
._______he is working much harder, he won’t have any trouble passing the entrance exams.
#34817
A
Ever since
B
In case
C
Even though
D
Now that
Find ways to praise your children often,_____ you’ll find they will open their hearts to you.
#32927
A
till
B
or
C
and
D
but