The teacher told the students________ football on the street.

Bob often ____ his mother with the housework on Sundays.

Before you leave the classroom ，please __the lights.

—Which do you like ______, tea or coffee?

—A cup of tea, please.

There are few _______in the fridge. Let ’s go and buy some peas ，carrots and cabbages.

I usually walk to school, but ____ bus when it rains. 

根尖结构中吸收水分的主要部位是()

Whose eraser is this?

--It's ________.

参天大树的根部吸收的水，能够达到树冠的顶部，主要的动力来自()

对于植物繁衍后代来说，花中最重要的结构是()