当你的朋友遇见你说:“How are you?” 你应回答____________。A. GoodbyeB. Fine, thank you.C. I’m thirteen.
---Thank you very much for your nice present. --- ____________.
---I will go to Beijing for a visit with my family during the winter holiday. ---______.
---What if I have to go there and know nothing about it? --- If I______ you, I would try to find some information about it on the Internet.
These young trees must ______.
Many Chinese students found______ difficult to learn English grammar.