When you lose your way in the city, you can _________ the policemen _________help.

About _____ 100 students took part in the activity.[ ]

China __________ the WTO and became a new member of it.

Is _______magazine yours, Joe ? —No, I don’t have _______magazine.

Do not give up! Perhaps ________ tough task needs more of your effort. — I won’t. I’ll have ________ second try anyway.