A.夏令营 | B.冬令营 |
A.Can I help you ? | B.What would you like ? |
A.You are welcome. | B.Thank you ,too. |
A.What are you doing now ? | B.What time is it now ? |
A.Here you are. |
B.May I have a look? |
A.in; it is | B.in; they are | C.on; they are |
A.are | B.is | C.am |
A.clean | B.cleaned | C.cleans |