Shanghai is one of _______ in the world .

The key _____ four modernizationslies _____ the science and education.

Nobodynoticedthethiefslipintothehousebecausethelightshappenedto_______

Let’s clean our neighborhood this weekend, shall we – ______

After a heavy ads campaign, our market share has increased ________ 15% ________ 60% in Asian market.