Mr. Green is said _____ an experiment to prove the new method of solving the problem when young.
| A．to do | B．to have done | C．to be doing | D．to have been doing |
相关试题
Have you ever dreamed of playing in front of thousands of people at a concert, _______everyone is clapping and appreciating your music?
| A．in which | B．for which | C．from which | D．at which |
Sometimes they may play to passers-by in the street or subway so that they can earn some______ money for themselves or to pay for their instruments.
| A．certain | B．extra | C．various | D．unusual |
The band about 1970, but happily they reunited in the mid1980s.
| A．broke up | B．broke down | C．broke out | D．broke in |
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