John and I _____ friends for eight years. We first got to know each other at a Christmas party. But we _____ each other a couple of times before that.
#4952
A
had been; have seen
B
have been; have seen
C
had been; had seen
D
have been; had seen
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China is a country __________ 56 different nationalities, among which Han ________ the majority of its population.
#4611
A
making up of; consists of
B
consisting of; makes up
C
made up of; consisting of
D
consisted of; making up of
.We will learn how to operate the machine _______.
#4731
A
at a time
B
at one time
C
at the time
D
in time
—The authors of computer viruses are geniuses.—I agree. If they applied their wisdom to other net technology human beings can benefit, it would be better.
#4910
A
in which
B
through which
C
from which
D
during which
.. ________the cake________five parts. We will share three of them and leave the rest to Jack.
#4783
A
Separate …from
B
Take …from
C
Divide … into
D
Divide …from
1 feel that one of my main duties ______ a teacher is to help the students to become better learners.
#4903
A
for
B
by
C
as
D
with