The engineers in this lab spent several weeks _______their plans for the new bicycle.

We are _______ at the rapid progress Mark has made in this semester.

Much of the news provided by this newspaper is_______, not foreign.

Pine trees are usually believed to _______ cold weather.

He tried to _____ __relations with his former wife but he failed.

Free medical service is _______ to nearly all the college students in China.

He _______ to study harder in the future so that he could have more opportunities to find a better job.

The _______ work continued for more than a week but there was still no sign of the missing boy.

After working for twenty hours without any rest, the doctors were _______.

The college students in China are _______ from smoking on campus because this will do them no good.