—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. if　 C. which　　 D. that

—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.

1. A.
   when
2. B.
   that
3. C.
   which
4. 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. If          C. which       D. that