Question

________ it to clear up tomorrow, the tourists would climb to top of the mountain to wait for the sun ________．

1. A.
   If; to raise
2. B.
   Were; to rise
3. C.
   Should; to rise
4. D.
   Because; raising

Answer 1

C
Were it to clear up tomorrow＝If it were to clear up tomorrow，與將來事實相反的if條件句；wait for sb/sth to do sth“等待某人或某物去做……”。