—What are you going to do, Mary ? —I’m going to draw some pictures in the park. It’s my favorite _______. 

We won’t start the meeting ________ the teacher arrives.

---Is this _______ ruler?---No. _______ is over there.

---        do you take exercise?--- Twice a week.

---Excuse me, the shirt is a bit small for me. ----Don’t worry. I’ll change it for a __________ one.