30. —This wall of air is an effective answer to the problem and it ______ work. —But it is a question to put such a wall of air around the statue.
I didn’t hear what he was ___. A, telling B. saying C. talking D. speaking
The city underground __ more people than buses.
he President’s death was ___ by the state radio. A. announced B told C. spoken D. talked
When my sister phoned me, I couldn't hear clearly what she was ___.
I can hardly ___ the difference between these two words.