问题
选择题
The field research will take Joan and Paul about five months; it will be a long
time ____ we meet them again.
A.after
B.before
C.since
D.when
答案
B
译文:实际教学/现场调查研究将花Joan 和 Paul 大约五个月时间;将过很长时间我们才能在见面。考点: