—Do you like math?—Yes, it’s difficult ________ really interesting.
#55877
A
but
B
and
C
or
D
so
推荐题目
As it reported, it is 100 years _____________ Tsinghua University was founded.
#56230
A
when
B
before
C
after
D
since
No matter what you do, you can’t change the situation.
#55515
A
whoever
B
wherever
C
whatever
D
what ever
He realized his mistakes and took action to reduce the loss _______ it was too late.
#56725
A
until
B
when
C
before
D
as