are here .
---Why do you like summer best? ---______ I can swim in the lake. A.Because B.So C.And
It is August the _______ today. A.twenty B.twentyth C.twentieth
Can I speak _____Yao Ming, please? A.to B.with C.at
The tree _________ are green in spring. A.leafs B.leaves C.leaf
They _______ the insects carefully. A.watching B.are watching C.is watching