Please tell Tom not to leave the classroom unless he ______ that all the lights ______.
#100303
A
makes sure; are turned off
B
makes sure; will be turned off
C
is made sure; are turned off
D
will make sure; will be turned off
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It is the first time I ______ this kind of music.
#100782
A
heard
B
am hearing
C
have heard
D
had heard
A poet and journalist ________to give us a speech tomorrow  in our school .
#103352
A
is said.
B
are said
C
is saying
D
are saying.
-Why does the river smell terrible?-Because large quantities of water______.
#100039
A
have been polluted
B
is being polluted
C
has been polluted
D
have polluted
The first edition             in 1955 and         a best seller ever since.
#101874
A
was published; had been
B
had been published; had been
C
has been published; has been
D
was published; has been