29. What change in the following sentence should be made?
(4) It wasn't since 1993 when cigarettes ad spending fell and market analysts agreed Joe Camel was old hat, that teenage smoking went up.
(A) no change
(B) change "It" to "There"
(C) change "since" to "until"
(D) change "agreed" to "agree"
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統計: 尚無統計資料
統計: 尚無統計資料