The professor, ________ his assistants, _______ conducting the experiment.
| A．in addition, is | B．as well, is |
| C．in addition to, are | D．as well as, is |
The two Chinese scientists have made a wonderful discovery, which marks a major _______ in the basic research in the field.
| A．reform | B．approach | C．boundary | D．breakthrough |
The incident caused a hot discussion on the Internet, but the local government had no immediate _______ on it.
| A．adjustment | B．commitment | C．comment | D．document |
The young violinist is very excited because the concert given by him has never been _____.
| A．successful | B．more successful |
| C．most successful | D．the most successful |
______ enough time, he was full of confidence to finish the project.
| A．Offered | B．Being offered | C．Having offered | D．Offering |
Looking after very young children _____ be very annoying sometimes, but you’ll get used to it after a while.
| A．must | B．should | C．shall | D．can |