—All the building materials have been wa
问题:
—All the building materials have been washed away.
—So I have heard. But there was no sign ____ a heavy rain was on the way last night.
A.when
B.that
C.which
D.If
—All the building materials have been washed away.
—So I have heard. But there was no sign ____ a heavy rain was on the way last night.
A.when
B.that
C.which
D.If