The heavy rain is so troublesome. it would stop!
A. Only if
B. Even if
C. Ever since
D. If only
网友回答
A. Only if
B. Even if
C. Ever since
(答案→)D. If only
解析：考查连词：A. Only if只是如果，B. Even if即使，C. Ever since自从，D. If only但愿，后面接从句用相应的过去时表示虚拟语气，句意是：大雨真烦人，但愿能停。指现在的情况用过去时表示虚拟。选D。