补全对话.A：_1__are you doing now ,Li Hua?B:I'm going to _2_.There is_3__time.It's too__4_.
A:Is it late?What's the _5__?
B:It's 7:45.Classes begin __6_8:00.I must be late for school.
A:No,you're _7__today.Look at your__8_ ,please.
B:Oh!It_9__ 7:00 now.__10_ goodness!
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