Ben was busy taking a training class. ______we had to wait for himfor half an hour..
#57651
A
so
B
if
C
or
D
but
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As it reported, it is 100 years _____________ Tsinghua University was founded.
#56230
A
when
B
before
C
after
D
since
_____ they are very tired, they feel happy because they’ve finally finished their project.
#58350
A
So
B
Although
C
If
D
But