Look at the clock! It＇s time _________ work.

________ the final examination is over , we can go outside for a picnic.

My father believes that interest, as well as prospects, ________ important when one looks for a job.

—I cannot find Tom anywhere. —He _______ have been off long. I heard him make a call just now.

It is necessary that everyone _________ a copy of this book.

We are happy at the good news _________ Mr.Black has been awarded the Best Manager.

____________ in the company for three years, Mark has become experienced in business negotiations.

The new staff didn＇t know how to use the system __________ I explained it to him yesterday.

It＇s getting dark; we＇d better stop working and make _________ home.

In most cases, the ________ of a person who sits on a pin is to leap into the air.

__________ is known to all , Peking University is one of the most famous universities in China.