Students are encouraged to _________ the design competition for robots at the university.
| A．take part | B．operate | C．join to | D．participate in |
--- What’s the time?
--- Oh, I forgot to have my watch ______.
| A．wind | B．wound | C．winded | D．winding |
The radiation amount of a mobile phone for two half-hour periods per day is equal to ______ to an X-ray for ten seconds.
| A．expose | B．exposing | C．exposed | D．being exposed |
Yifu library was named ______ a businessman devoted to China’s education.
| A．in honour of | B．instead of | C．in favour of | D．by means of |
The boy knocked down by the car stood up all by himself , _____unhurt.
| A．apparently | B．doubtfully | C．unfortunately | D．generally |
——I think the book is as interesting as it is instructive．
—— It could never be____．It is well worth reading．
| A．as true | B．true | C．the truest | D．truer |