.They turned out more than 1,000 washing machines, most of which ________quality.
| A．is good | B．are good | C．is of high | D．are of high |
China has hundreds of islands, _____ is Taiwan.
| A．the largest of which | B．of which largest |
| C．which the largest | D．in which the largest |
With the guide _______ the way, we finally got to the village which we were looking for
| A．led | B．leading | C．to lead | D．had led |
Students are encouraged to _________ the design competition for robots at the university.
| A．take part | B．operate | C．join to | D．participate in |
The plan has to be _______ to meet the real situation.
| A．adjusted | B．adapted | C．produced | D．refounded |
I ______ my university professor in the supermarket near my house, which was out of my expectation.
| A．came out | B．came across | C．came about | D．came along |