You must be excited about going to America for schooling. —______, but I am afraid I can’t do well because my English is poor.

Whose names are these, ________ or yours? —_______. I don’t know all of the students in Class 5, so I have _______on this piece of paper.

There are two dogs in my family. One is white,_____________ black.

Where is my pen?—I _________ it on the desk, but I don’t know who _________ it away.

Could you tell me ______ it takes to go from here to Beijing by air? – About 50 minutes.[ ]