——Do you have any idea when the project
问题:
——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
——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