—The cars give off a great deal of waste gas in the street.
—Yes, But I’m sure something will be done to air pollution.
| A．reduce | B．remove | C．collect | D．warn |
相关试题
________ many times, he finally understood it.
| A．Told | B．Telling | C．Having told | D．Having been told |
As a new diplomat, he often thinks of_____- he can react more appropriately on such occasions.
| A．what | B．which | C．that | D．how |
—Would you please help me with the box? 
—_________
| A．Yes, please | B．No, please don’t | C．With pleasure | D．My pleasure |
David threatened_____ his neighbour to the police if the damages were not paid. 
| A．to be reported | B．reporting |
| C．to report | D．having reported |
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