当经介绍后认识某人时，你应该说：
| A．Good morning. |
| B．Please sit down. |
| C．Thank you. |
| D．Nice to meet you. |
I ate ____ egg and went to school with ___ book in hand.
A / ; aB. an, / C.an, a
Read and choose (读句子，选出正确的答语。)
--Don’t let the dogs run too fast.--.
A. Thank you.B. Let me try. C. You’re welcome.
Look the pictures. They are beautiful.
| A．to | B．/ | C．a | D．at |
go at the red light!
| A．Don’t | B．Do | C．To do | D．Does |