Sarah是班长,老师走进教室准备上课,她应该这样说:A. Sit down.B. Good morning.C. Stand up.
Leaves must ____________ green to make food for plants and trees. A. is B. be C. are
They ____________ sunlight,air,and water. A. need B. needs C. needes
What do they need ____________ food? A. to make B. make C. making
—____________ is it? —It's yellow. A. Which color B. What color C. What
I'm really sad because I ____________ my bike. A. use B. lost C. loses