People will also take vacations _____ other planets. [ ]

Do you think it is _____ to write an English essay?—Yes, you can do it ______ if you practice more.

Would you like __________ orange juice? —No, thanks. There is __________ in my bottle.

I can’t stop smoking, doctor.— For your health, I’m afraid you________.

There was going to ___ a struggle between her two friends. She doesn’t know __ to deal with it.