完成对话。A: Hello !小题1:B: Yes . What’s up ?A:小题2:Could I borrow

完成对话。
A: Hello !小题1:
B: Yes . What’s up ?
A:小题2:Could I borrow your bike again ?
B: Certainly .小题3:Has your bike been broken again ?
A: No . I’ve lost my key to the bike . But I have to go to see a friend .
B: I see .小题4:
A: About four o’clock .
B: OK . Here is the key .
A:小题5:
B: Bye !