问题
选择题
Do you have any idea when the project will be carried out?
—No, but I have heard that it was not until last month _______ it was approved.
A．that
B．when
C．since
D．before
答案
A
题目分析：句意：--你知道这个项目将什么时候被执行吗？---不，但是我听说直到上个月它才被批准。此处是it was not until……that……结构，表示知道……时候才…….，故答案选A。
考点：