Question

We'll go to visit Tian'anmen Square ________ it doesn't rain tomorrow．

A. if
B. as soon as
C. when
D. since

Answer 1

答案A
根据主从句的意义分析，从句内容是主句中动作go的前提，“如果……就……”，故用if。其他如as soon as“一……就……”，则强调时间。