2. 外语
  3. Reasons for careful teaching range from preventing a child ______ to keeping a child occupied.

Reasons for careful teaching range from preventing a child ______ to keeping a child occupied.

admin2010-02-17  49
问题 Reasons for careful teaching range from preventing a child ______ to keeping a child occupied.
选项 A、sinking behind
B、falling behind
C、drawing behind
D、crawling behind
答案B
解析 这里词组fall behind相当于lag behind／get behind／drop behind／be behind：落后。
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