A typical instant-messaging conversation lasts（）.
A.at least one hour
B.more than one place
C.more than one hour
D.at least half an hour
正確答案：at least half an hour
題目：A typical instant-messaging conversation lasts（）.
關鍵字：智慧樹
相關試題
1.Teachers get upset about instant messaging because（）.
2.Children are writing when they send instant messages， and their typing skills are improving meanwhile.
3.Instant messaging is getting in the way of children’s lives.
4.Parents monitor their children either by limiting time online or by keeping the computer in a common area.
5.Why do drivers stop at a red light late at night？
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