My flight to Paris ____________ from Shanghai International Airport last night.

Do you find ____ hard to understand real English?

---_____ have you studied English?   --- Since I was six.

—Which of these places will you visit, Yandu Park, Sheyang Nature Reserve or Dazong Lake?—________. Because I have been there many times.

 What         will global warming(全球变暖) bring us? Scientists have given us a clear list.