The telephone __________，but by the time I got indoors, it stopped.
| A．had rung | B．was ringing |
| C．rings | D．has rung |
When I called at his home the other day, I found him sitting on an armchair,_____ in his hands.
| A．his head bury | B．burying his head |
| C．his head burying | D．his head to be buried |
These teams, which _____twenty experienced workers, are working hard here to ___the time they have lost before.
| A．are made up of; make up of | B．are made up of; make up for |
| C．make up; make up for | D．make up for; make up |
The chairman thought ________ necessary to invite Professor Smith to speak at the meeting.
| A．that | B．this | C．it | D．him |
All day long， by the side of the road ______， looking at the passing cars and people.
| A．was he sitting | B．sat he | C．did he sit | D．he sat |
Eating too much fat can ______ heart trouble and cause high blood pressure.
| A．result from | B．attend to | C．contribute to | D．devote to |