Students are encouraged to _________ the design competition for robots at the university.
| A．take part | B．operate | C．join to | D．participate in |
John’s classmates offered him their congratulations ______ his successful performance in the school concert.
| A．on | B．at | C．for | D．to |
It was Paul’s low test scores that ______ his chances of getting into a good school.
| A．recovered | B．protected |
| C．expressed | D．ruined |
---- Have you ever been to Chongqing?
----- No. It is the first time that I ______ this beautiful city.
| A．have visited | B．had visited |
| C．am visiting | D．visited |
—Reading is the best way to pass time on the train.
— , I never go traveling without a book.
| A．You are joking | B．That's true |
| C．I don't think so | D．It sounds like fun |
Though they hadn’t met for many years, they _____ each other at first sight.
| A．realized | B．recognized |
| C．regretted | D．remembered |