The students _______ their homework carefully when the teacher walked into the classroom quietly.
#36148
A
do
B
did
C
are doing
D
were doing
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___How time flies!It’s already twelve o’clock. ___ Oh,really? I ______ it at all.
#41598
A
don’t realize
B
Didn’t realize
C
haven’t realized
D
hadn’t realized
Jim has made many friends since he ______ to China.
#42005
A
came
B
comes
C
has come
D
will come