However，at times this balance in nature is＿＿，resulting in anumber of possibly unforeseen effects．
| A．troubled | B．disturbed | C．confused | D．puzzled |
相关试题
The old man is telling the boys________ story as__________last time.
| A．as funny a; he did | B．the same funny; he did it |
| C．such a funny; he did so | D．as a funny; he did |
Do you know the difficulty he had___________his family ?
| A．to support | B．supporting | C．supported | D．being supported |
They failed to realize the use_____________the information.
| A．we made of | B．which we made | C．for our making | D．for us to use |
Listen ! The matter ___________has somethin
g to do with all of us.
| A．to discuss | B．to be discussed |
| C．being discussed | D．having b een discussed |
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