The matter is not to be ____.
#258
A
watched for
B
waited on
C
taken over
D
trifled with
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We often have to stay up for our study though we___ to have enough sleep.
#53948
A
told
B
have told
C
are told
D
are telling
The unemployment rate in this district    from 6% to 5% in the past two years. 
#104587
A
has fallen
B
had fallen
C
is falling
D
was falling
-_____do you go to the library?-Once a week.
#35558
A
How long
B
How soon
C
How often
D
How many times