I’m going to the States.—How long ________you________ in the States

Tina failed in the math test. Shelooks very sad. —Let’s come to cheer her________.

While seeing the film, what had happened on the battlefield ________ in the old man’s mind.

Experts say ________ to sunlight for too muchtime will do harm to one’s skin.

Can you believe___little children can finish the difficult problem in___ a short time—I can’t believe it until I see it with my own eyes.