_____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
—How do you deal with the disagreement between the company and the customers? —The key _______ the problem is to meet the demand _______ by the customers.
In order to make our city green, _______.
In order not to be disturbed ,I spent three daysin my study.
He sat back on the chair, took a book and began to read, ___.
David apologized for ______ to inform me of the change in the plan.