题目内容：
第（29）题答案
A．opened B．rolled
C．sharpened
D．widened
参考答案：
答案解析：
单选题：第（29）题答案
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B．rolled
C．sharpened
D．widened
B．rolled
C．sharpened
D．widened
Teachers recommend parents_______their children under 12 to
Teachers recommend parents_______their children under 12 to ride bicycles to sch
第（22）题答案
第（22）题答案A．on B．along C．over D．across
You and I could hardly work together,_______?
You and I could hardly work together,_______?A．could you B．couldn' t I C．couldn'
第（53）题答案
第（53）题答案
What will be different when the son attends graduate school?
What will be different when the son attends graduate school?A．He will spend holi