________ is difficult if you put your heart into it.
-- Hello, may I speak to Mr. Smith?-- Sorry, he isn't in. He ______the office.A. has been toB. has gone toC. has been away
Mike will go abroad tomorrow. I am going to _____ at the airport.A. sent him offB. see him offC. saw him off
There is no living thing on _______ moon.A. the B. a C. 不填
–_______? –I like tennis and volleyball best
--Do you think the English class _______? --No, we all like it.