Given more attention, the work（） A: had been better done B: will be done better C: was better done D: could have been better done

If the climate had been more favorable, the crops still better. A: would have grown B: would be growing C: would be grown D: will grow

If he had been in better health, he ______ more books. A: can write B: could have written C: could write D: have written

I could have done better if I _________ more time. A: have had B: had C: had had D: will have had

Which of the following are the benefits from the slow green trains in China in the 21st century? A: Students could spend less money on the way home. B: Environment could be protected better. C: People in the remote areas could have more chances to visit faraway relatives and friends. D: Poor peasants could have more access to sell their agricultural products.