David（）his company’s success to the unity of all the staff and their persevering hard work.

单项选择题It is a contradiction that in such a rich country there should be so many poor people（）

A. pageant
B. patronage
C. paradox
D. pendulum

单项选择题She felt a bit（）in the autumn air so she went in to fetch a coat.

A. chilly
B. fresh
C. shivering
D. cool