-- 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
-- Can we make this plan a week later? -- No, we can’t put off _______ it because the meeting is only two days from now.
--When _____ the abacus _____? -- In the sixth century by the Chinese people.
We have been friends for nearly twenty years. Nothing can break off our _______.
In our city, ________ college students want to work as a teacher in holidays.
I don’t like eating chocolate. The taste is too ________.