The news shocked the whole nation ____a strong earthquake hit Yushu on Apr．14, 2010．
#34027
A
what
B
when
C
that
D
which
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Questions and exercises are given by the computer, which decides ______ to move the students ahead, review an easier level, ____ give more work on the same level.
#80118
A
either, or
B
both, and .
C
whether, or
D
not only, but also
Jim came back early last night. It was not yet eight o'clock ________ he got home.
#30541
A
before
B
that
C
when
D
until
It is known to all that ____ you exercise regularly, you won’t stay healthy.
#31547
A
because
B
unless
C
now that
D
in case