单项选择题
()illness, he went to the seaside for vacation.
A. Due to B. According to C. Owing to D. For the sake of
单项选择题 He left school()the age of sixteen.
单项选择题 --I can't see the blackboard very well.--Perhaps you need ()
单项选择题 When people ask him for help, he never turned his back () them.
