当你向朋友介绍自己的妈妈时,应该说___________A.She is my mom . B.This is my mom.
It is August the _______ today. A.twentyB.twentyth C.twentieth
Can I speak _____Yao Ming, please? A.toB.withC.at
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