If you meet some new words, you'd better ________ in a dictionary.
A．look out them
B．look up them
C．look them up
—I think she should stop wearing those silly earrings.
—________. I like those earrings. She looks so cool.
A. I disagree.
B. I think so.
C. I agree.
This dictionary must belong to ________.Because I saw him using it yesterday.
A .Tom’s B. Tom 
C Mary
Are you afraid of _____ alone?
A. sleep B. to sleep C. Sleeping
—Where’s Bill ?
—He ________ in the office. I saw him playing basketball on 
the playground just now.
A. can’t be B. must be C. can be
Basketball was invented by ______ Canadian doctor named James Naismith.
A. a B. an C. The
