—Hello, can I speak to Mr. Smith?—I’m sorry, but it is 3 weeks _____ he worked here.
#31785
A
before
B
since
C
after
D
while
推荐题目
The road back home may be difficult before the Spring Festival, ______ the desire to get together with family members can never be stopped.
#31285
A
while
B
and
C
but
D
as
________you never plan to visit the polar bears in the North Pole or the penguins in the South Pole，now it is the proper time to start thinking about that.
#30102
A
Until
B
Unless
C
As long as
D
Even if
_______ we start thinking and believing we can do it, anything is possible.
#32281
A
Since
B
While
C
Until
D
Once
How did you manage to get to school on time ______ you missed the school bus?
#79910
A
when
B
if
C
once
D
because