Have you decided ____________ on April 1st?—I will put a piece of paper which says “Hi” on my brother’s back.

This picture is quite old, we can still see it was drawn in century.

I don’t think we can find a new day to work out the problem. — But we’d better not .

The box is ________ heavy ________ I can’t lift it.

________ you stepped into the lab with your shoes on? You’re supposed to take them off before you enter it. I told you so!