There seven days in a week .
The tree _________ are green in spring. A.leafsB.leavesC.leaf
They _______ the insects carefully. A.watching B.are watchingC.is watching
---When do you watch TV? ---I usually watch TV ______ seven o’clock. A.inB.onC.at
I am ________ a picture. A.drawB.drawingC.draws
找出与其他不同类的一项，并把序号填入括号内。（每小题2分，共10分）（）
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