As high school students, it’s very important to keep ourselves ______ of what’s happening home and abroad every day.
#103371
A
to inform
B
informing
C
informed
D
be informed
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When I got there, the meeting _____ for ten minutes.
#102051
A
has been on
B
had begun
C
had been on
D
has begun
Tom       in the library every night over the last three months.
#102657
A
works
B
worked
C
have been working
D
had been working