Many experts believe that teachers’ development is _______ the key to better education lies.
Being honest ______ not get you a lot of friends, but it _______ always get you the right ones.
It is said that this project will take ________ two to three years, and cost about 200 million yuan.
We do not own the building.________ it would be impossible for us to make any changes to it.
---- ________ you like the cell pone so much, why not buy it?---- Well, I don’t have enough money.
The advantages of living outside campus are ________. Students who live outside can enjoy more freedom and have more independence.