UNIT 1
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1.Most cities in the country have introduced
鈥淐lean
Air
Zones鈥?/p>
whereby
factories and households are only allowed to burn smokeless fuel.
2.He knows that the pursuit of social status can consume vast amounts
of hi
s time and effort.
3.The doctors are at a loss because so far no medicine has been found to inhi
bit the spread of the disease.
4.We see many special education directors trying to maintain the quality of th
eir programs.
5.People there are told it is their patriotic duty to support the national
econ
omy by buying their own products.
6.Darwin鈥檚
thinking both drew upon and transcended the conventional
id
eas of his time.
7.In spite of all your endeavors, there may be times when you encounter diffi
culties in the training process.