2. 外语
  3. The missing boys were last seen______near the river.

The missing boys were last seen______near the river.

admin2018-01-16  43
问题 The missing boys were last seen______near the river.
选项 A、playing
B、to be playing
C、play
D、to play
答案A
解析 本题考查分词用法。现在分词作主语补足语，表示动作正在进行。
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成人本科学位英语

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