I ________a primary school student two years ago.
#38754
A
am
B
was
C
be
D
were
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-- They look so tired.--Yeah. They _____________ day and night. So they are all in poor health.
#40605
A
are made work
B
are made to work
C
made to be worked
D
are making to work
Someone ______ at the door. Can you open it?
#36310
A
knocks
B
knocked
C
is knocking
D
was knocking