My Chinese teacher told me that it was ___known that China is a big country.

The houses for the low-income families _______ at present in our city will be completed next year.

e limited supply of water has beenput into practice, take care to turn off the running ____ before you leave

are you busy with—The conference _____in our city next week,as you know

How do you deal with the disagreement between the company and the customers?— The key _____ the problem is to meet the demand _____ by the customers[ ]