His injuries are serious but he is expected to _______.

 The old scientist took up walking as a regular form of exercise, which, of course, is of great        to his heath.

If he works hard at his lesson, I guess he can _______the final exams.

We should try to do as many _______ things for the environment as we can.

Transit, a car made in Jiangxi province, was sold nearly 50,000 units in 2012, with the total value_____ it was in 2008．