备考跟踪训练20
一、单项选择。
1．Many young people took part in__A__trees on Tree Planting Day.(2013，甘肃白银)
A．planting B．plants C．to plant D plant
2．—I'm not going swimming tomorrow afternoon.
—Neither am I．I have to__A__my bedroom.(2013，兰州)
A．clean up B．look up
C．give up D．set up
