The doctor did what he could __________ the dying man.
We usually play ______soccer for half _____hour on _____playground.
语音
A howB.knowC.now D .down
— You are kind to give me a ride to the post office. — ________.
— How long ________ they ________ the English Club? — For almost one year.
There are ________ people in the supermarket ________ we can’t buy things quickly.