---What’s wrong with my stomach?---There is nothing serious; you can __________.

Smoking, ____ some smokers, might ease their anxiety sometimes, but ____ the addiction caused by their constant practice, it is really hard to give up.

It’s Steven Jobs that _______ the idea of iphone and ipad.

—What about the protection?—Let’s keep the surface        dirt by putting a cover over it.

.The middle-aged woman ____ so much money on clothing .