We are at your service. Don't （）to turn to us if you have any further problems.

单项选择题According to statistics, a man is more than twice as likely to die of skin cancer（）a woman.

A. than
B. such
C. so
D. as

单项选择题Some people who don't like to talk much are not necessarily shy; they （）just be quiet people.

A. must
B. may
C. should
D. would

单项选择题She'll never forget her stay there （）she found her son who had gone missing two years before.

A. that
B. which
C. where
D. when

单项选择题— How about your journey to Mount Emei — Everything was wonderful except that our car （）twice on the way.

A. slowed down
B. broke down
C. got down
D. put down

单项选择题（）the project in time, the staff were working at weekends.

A. Competing
B. Having completed
C. To have completed
D. To complete