What's up， Tony？
Well， Mr． King， could you tell ______？（ ）
A．how did you learn history
B．when the art festival is
C．where were you yesterday
D．what are they drawing
The safety of food has become one of the ________ problems in our daily life．（ ）
A．importantB．more important
C．most important
In order to make our city more beautiful，we have planted _______ trees these years in Yiyang．（ ）
A．three thousandsB．thousand of
C．thousands of
Are these _________ new trousers？
No，they are not _________．（ ）
A．your，myB．your，mineC．yours，mine
________ fine weather it is today!（ ）
A．WhatB．HowC．What a
It took me half _______ hour to finish my homework last night．（ ）
A．aB．anC．the