I can’t find         backpack. Can you help         ?

---Excuse me，I want to buy some milk．Where can I find a supermarket?
---Oh，I know ________ not far from my home．

---Miss Li, where did you visit last week?
--- I visited a big company __________ ships are made.

---Mum, have you seen my mobile phone?
---_______ you bought last week? I’m afraid I haven’t seen _______.

--- Mum, have you seen my mobile phone?   
---_______you bought last week? I’m sorry I haven’t seen _______.

Linda's father isn't an engineer.  Her mother isn't an engineer, ______ .

“Have ________ try, you are so close to the answer,” the teacher said to Eric.

Miss Li teaches ______ English every day.

——I haven't got a camera.
——I think you should buy_______. It's useful for you.

We must try ______ best to make our city more beautiful.