This picture _____ by a young reporter in Beijing last month.
A. take
B. took
C. taken
D. was taken
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You’d better _______ the bus.
A. to catch
B. caught
C. catch
D. catching
Many a teacher and many a student _______ busy with paper.
A. am
B. is
C. are
D. be
There are my friends who _______ preparing for the party.
A. am
B. is
C. are
D. be
Walking with my mother __________ my happiest time.
A. am
B. is
C. are
D. be