He felt _______ to remind the public to protect the environment.
| A．his duty | B．that is his duty | C．it his duty | D．it is his duty |
Mr King, _____ legs were badly hurt, was quickly taken to hospital.
| A．who | B．that | C．whom | D．whose |
He was generally _________ to be the finest poet in the land.
| A．received | B．regarded | C．seen | D．acknowledged |
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 |