Using a telescope we could see that something     .
#102178
A
is happening
B
happened
C
would happen
D
was happening
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______ over and over again, but he still couldn’t understand.
#103480
A
Having explained
B
Having been explained
C
Explaining
D
It had been explained
I can guess you were in a hurry. You      your sweater inside out .
#103993
A
had worn
B
are wearing
C
were having on
D
were dressing