1.19 Country life is better than city life__it offers fresh air and noiseless environment.

1.1Why do you look so__? You never smile or look cheerful.

1.20 The quarrel___（origin）in a misunderstanding.

1.19 Country life is better than city life__it offers fresh air and noiseless environment.

1.18 Their art does not try to serve society; it＇s just art for art＇s.

1.17 The weather forecast was good so it should____fine after all.

1.16 We__people for doing what they know is wrong.

1.15 The painter gave the art students___（construct）criticism of their work.

1.14 It is highly desirable that a new president___（appoint）for this college.

1.13 John has just taken___the family business from his father.

1.12 I___play tennis than golf.