Her sister always spends so much _____ her clothes that she can’t manage to live with her salary.

_____, the professor is still trying to learn a new language.

The engineer （ ） my father works is about 50 years old.

The committee members meet _____ every Saturday and Sunday mornings.

A news report is usually very short, （ ） when it is about something very important.

The purpose of the conference is to （ ） the friendship among the Asian countries.

The travelers are going to Taiwan, （ ） they plan to stay for two or three days.

The little boy saw the plane_____and burst into flames.

The authority urged the rebellious party to _____ their arms and come back to the negotiating table.

（ ） that the trade between the two countries reached its highest point.

Without his wartime experience, Hemingway _____ his famous novel A Farewell to Arms.

The reason is （ ） he is unable to operate the machine.