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【单选题】
How did you manage to get to the school on time_________you missed the school bus?A.
when
B.
if
C.
once
D.
because
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反馈参考答案：
举一反三
【单选题】— May I call you this morning or tomorrow morning? — ____ is OK. I'm free today and tomorrow. [ ]
A.
Either
B.
Neither
C.
Both
D.
None
【简答题】Morning call: 2. ______________
【多选题】(多选)VRP中,以下关于RIP路由聚合的说法正确的是 (请选择3个答案)
A.
RIPv1默认支持路由聚合，需要时可以关闭路由聚合功能
B.
RIPv2支持关闭路由聚合功能
C.
RIPv1不支持CIDR
D.
RIPv2支持子网路由聚合
【单选题】——Why didn’t you call me this morning? ——I ______ call you. I called you all the morning, but I couldn’t ______.
A.
did, get over
B.
do, get it
C.
didn’t, get together
D.
did, get through
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