Listen and choose( 听音，选择你所听到的单词)
Planting treesgood for us. A. am B. isC. are
Trees can keep the air. A. clean B. beautiful C. hot
I should my little sister. A. take careB. look like C. look after
The children enjoygames. A. play B. plays C. playing
Tree Planting Day is 12th March.. A. on B. atC. in
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