Unit 5 What’s the highest mountain in the world？
I.单项选择。
1．The baby is about 52 centimeters tall _______ birth．
A．in B．at C．on D．for
2．The young man is _______ more famous than his father．
A．a lot B．many C．pretty D．quite
3．We shouldn’t _______ the trees in order to protect the environment．
A．write down B．put down C．take down D．cut down
4．The boy was badly ill．He had to drop out of school because of _______．
A．darkness B．illness C．history D．excitement
5．I can see some children _______ basketball on the playground now．
A．play B．played C．playing D．to play
