Scientists have to work hard to keep _____ with modern discoveries and developments.
| A．company | B．track | C．touch | D．pace |
It can’t be denied that the Diaoyu Islands are _______ part of China and what some Japanese have done recently is actually _______ offence against Chinese people.
| A．a; / | B．a; the | C．the; / | D．/; an |
—How are you, Jack?
—_____, I'm rather sick．
| A．In addition | B．As a matter of fact | C．On the other hand | D．On the contrary |
She _____ your birthday party, but she had to look after her mother in hospital．
| A．should attend | B．ought to have attended |
| C．can have attended | D．must have attended |
—Conductor, can I get to Market Street on this train?
—Of course．The train is leaving．_____, please．
| A．Step lively | B．Mind your step | C．Look out | D．Walk slowly |
____ is clear ____ the Diaoyu islands have been China's inherent territory （固有领土）both from historical and legal aspects since ancient times．
| A．That; that | B．This; this | C．It; that | D．What; what |