The field research will take Joan and Paul about five months; it will be a long time _________ we meet them again.
#15118
A
after
B
before
C
since
D
when
推荐题目
One of the most important questions they had to consider was _____ of public health.
#17193
A
what
B
this
C
that
D
which
—Who did you go to Huangshan Mountain with?— No, I didn’t go with ________.
#57143
A
everyone
B
someone
C
anyone
D
no one