While watching television, ____.
#96009
A
the doorbell rang
B
we heard the doorbell ring
C
there was someone knocking at the door
D
the doorbell was ringing
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I’m sorry, but I didn’t mean to keep you _____ here for a long time. Can you forgive me?
#94323
A
wait
B
waiting
C
to wait
D
waited
A harmonious society is like a symphony orchestra—each person contributes a small sound，but when ______ with other sounds，it becomes beautiful music.
#98131
A
combining
B
being combined
C
combined
D
to be combined
I climbed the stairs slowly with a big suitcase, my father with two more.
#96598
A
followed
B
was following
C
following
D
having following
Microblogs experienced rapid growth in 2011 in China, with the number of microblog Operators, users and visitors ________ several times.
#95156
A
to increase
B
increased
C
increasing
D
increase
When you long for life without difficulties, _____ yourselves that trees grow strong in contrary winds and diamonds are made under pressure.
#92283
A
to remind
B
remind
C
reminding
D
reminded