____of the land in that district ____covered with trees and grass.
| A．two fifth; is | B．two fifths; are |
| C．two fifths; is | D．two fifths; are |
_________ the right kind of training, these teenage soccer players may one day grow into the international stars.
| A．Giving | B．Having given | C．To give | D．Given |
After he left college , he was employed in an international company and __
___there ever since .
| A．worked | B．has worked | C．had worked | D．was working |
Unsatisfied ______with the payment ,he took the job just to get some work experience.
| A．though was he | B．though he was | C．he was though | D．was he though |
Bob would have helped us yesterday, but he_______
| A．was busy | B．is busy | C．had been busy. | D．will be busy |
Green products are becoming more and more popular because they are environmentally_______.
| A．friendly | B．various | C．common | D．changeable |