Don’t       the trees! We should protect our environment.

For most people, it’s very difficult to        air on the top of Qomolangma.

To exercise more is a good way to        us against illness.

—Do you believe paper is made        wood?
—Yes, I do. And you can see that books are made       paper.

—I have        in learning English and I’m so worried. Could you help me with it?
—Sure, I’d love to.

My alarm didn’t       . So I got up late.

I called Tom several times, but he didn’t       .

—I think drinking milk is good        our health.
—Yes, I agree        you.

Yesterday he offered       me carry the box.

My mother doesn’t allow me        TV at night.