—May I speak to Lin Tao?
—Sorry, he is not in. He ______ to Changsha.
A. has been B. has gone C. went
I ________ an engineer when I grow up.
| A．am | B．was | C．will be | D．Are |
__________ important for children __________ by themselves.
| A．That’s; to learn | B．It’s; to learn |
| C．That’s; learning | D．It’s; learning |
He wants ____________some vegetables.
| A．buy | B．buying | C．to buy | D．buys |
We _______ pay to get into the concert. It's free.
| A．can't | B．mustn't | C．might not | D．don't have to |
Mary likes learning English,______ she doesn’t like learning math at all.
| A．and | B．or | C．but | D．So |