There ______ great changes in our hometown in the past fifteen years.
#41872
A
has been
B
have been
C
was
D
were
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Don’t make a noise! They _______on a physics problem now.
#41516
A
will work
B
are working
C
worked
D
have worked
——Dad, please tell me when Mum_____. I miss her very much.——She will return when she_____her task. And she will bring a nice present for you.
#39162
A
returns;finishes
B
returns;will finish
C
will return;finishes
D
will return;will finish