[問題]96年10月structure Q15

[kelly513]

Tornadoes, powerful, destructive wind storms, occur most often in the spring when hot winds_____over flat land encounter heavy, cold air.
(A) which to rise
(B)that rising
(C) are rising
(D) rising
Ans: D
why the answer is not (c)

[tonza1248]

encounter 是動詞，一個句子不能有二個動詞
原文應該是 when hot winds which rise over flat land encounter heavy, cold air
去掉which 把rise 改成rising

應該是這樣吧！

[kelly513]

懂了,謝謝喔!