Don’t put the bag _______ on the ground. The things in the bag are easily broken.

—What’s the weather like outside?—It’s raining heavily . You’d better not go out.

We don’t know __________ he can make a plane by himself. It is amazing.

Amy thinks hamburgers are not healthy, so she _________ eats them.

________, the Internet was only used by the government. But now it’s widely used in every field.