2. 外语
  3. (If) traffic problems are not solved soon, (driving) (in) cities (becomes) impossible.

(If) traffic problems are not solved soon, (driving) (in) cities (becomes) impossible.

admin2013-01-03  87
问题 (If) traffic problems are not solved soon, (driving) (in) cities (becomes) impossible.
选项 A、If
B、driving
C、in
D、becomes
答案D
解析 主句的时态应用将来时态。改“becomes”为“will become”。
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成人本科学位英语

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