— How did the accident happen?
— You know, it        difficult to see the road clearly because it      .

---How did the accident happen?

---You know, it ________difficult to see the road clearly because it_________.

A. was; was raining        B. is; has rained   

C. is; is raining           D. will be; will rain

— How did the accident happen?

— You know, it        difficult to see the road clearly because it      .

A．is…was raining     B．was…had rained    C．is…is raining       D．was…was raining

— How did the accident happen?
— You know, it        difficult to see the road clearly because it      .

1. A.
   is…was raining
2. B.
   was…had rained
3. C.
   is…is raining
4. D.
   was…was raining

---How did the accident happen?

---You know, it ______ difficult to see the road clearly because it

1. A.
   was; was raining
2. B.
   is; has rained
3. C.
   is; is raining
4. D.
   will be; will rain

—How did the accident happen?

—You know, it       difficult to see the road clearly because it      .

A．was; was raining                 B．is; has rained

C．is; is raining                     D．will be; will rain

 — How did the accident happen?

— You know, it        difficult to see the road clearly because it      .

A. is…was raining  B. was…had rained  C. is…is raining  D. was…was raining