The scientists were waiting to see the problem _______.
| A．settle | B．settled | C．to settle | D．settling |
What he’d like __________a digital watch.What he’d like__________textbooks.
| A．are; are | B．is; is | C．is; are | D．are; is |
Not only he but also we __________right.He as well as we__________right.
| A．are; are | B．are; is | C．is; is | D．is; are |
What __________the population of China? One-third of the population__________workers here.
| A．is; are | B．are; are | C．is; is | D．are; is |
The number of teachers in our college __________greatly increased last term.A number of teachers in this school __________from the countryside.
| A．was; is | B．was; are |
| C．were; are | D．were; is |
Onethird of the area__________covered with green trees.About seventy percent of the trees
__________been planted.
| A．are; have | B．is; has | C．is; have | D．are; has |