Sally prefers drawing playing the piano.[ ]

Mike, please be quiet, or the other students hear me clearly.

Do you know whether scientists have ________a good way to deal with Influenza H7N9 or not?—Not yet .But they’re trying their best.

Where is my bag? I can’t find it.—Don’t worry. It must bein your room.

Liu Yang is the first Chinese woman astronaut ______ has ever traveled in space.