—We really shouldn’t use plastic bags any more when shopping.—_____ It’s important to protect our environment.
—What is on the desk? —There ____ a book and two pens on it.
—Jim, which _________do you like best? —I like geography best.
— _______ classes do you have every weekday? —Seven classes.
—______ drive after drinking. It’s too dangerous(危险的). —OK. I won’t.
—What are you doing, Jack? —I am _______ my schoolbag, but I can’t find it.