单项选择(每题1分)In his letter was his promise _____ he would spend the Christmas Eve with me.
#70344
A
that
B
what
C
which
D
whether
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This is the only one of the books on space ___.
#71605
A
that has been written
B
that have been written
C
which have been written
D
which has been written
As far as I see,   is no possibility      he will win the tennis match this time.
#68106
A
it ; that
B
there; that
C
it ; whether
D
there; whether