题目内容
（请给出正确答案）
[主观题]
When he was in his______, he began to study English.A．fortyB．forty'sC．fortiesD．forty's yea
When he was in his______, he began to study English.
A．forty
B．forty's
C．forties
D．forty's years old
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A．无线路由器
B．网络适配器
C．总线
D．集线器
