2. 外语
  3. The authorities spend a lot of money ______ keeping the streets and parks clean.

The authorities spend a lot of money ______ keeping the streets and parks clean.

admin2008-11-13  50
问题 The authorities spend a lot of money ______ keeping the streets and parks clean.
选项 A、in
B、on
C、up
D、out
答案B
解析 spend…in doing sth．是固定结构，表示“花钱或时间做某事”。
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成人本科学位英语

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