If you bring snacks to the party, the teachers will ___________.
—–I think the man over there must be Tom.—–It _____ be him. He has ______ to America.
There are millions of websites on the Internet and there _______ a lot of useful _________on the websites.
You will achieve nothing ________ you work hard.
—Ipreferspeaking to listeningin English learning.—Oh, really? I think you should do well in______ of them.
—Do you know ______ woman in red?—Yes, she’s a professor of_________ university.