--- Is Mr. Smith in the office? --- Yes,_____ he is in charge of the office,he must be there.
I was about to leave my house______ the telephone rang.
A computer costs about ______ of a typewriter.
---When did you arrive here?---Just ______when you left.
The first day of ______ year is called ______New Year’s Day. A. the; / B a; / C. the; a D. the; the
This pen doesn't look like ______. ______pen has been lent to Xiao Wang. I think it must be______.