The president spoke at the business meeting for nearly an hour without ____ his notes.
A．bringing up B．looking for C．referring to D．trying on
David worked hard at his lessons ____ he gained high grades in the exams.
A．so that B．in order to C．though D．because
As a young man, Zhou Enlai ____ the students movements and later ____ the Communist Party of China.
A．joined; took part in B．took part in; joined
C．joined in; took part in D．took part in; joined in
Camels were ____ better than horses for travelling a long distance.
A．more B．far C．quite D．very
When I was in the countryside, I ____ by the riverside every day.
A．walked B．was walking C．walk D．have walked
The book has been translated into thirty laguages since it ____ on the market in 1973.
A．has come B．comes C．had come D．came
