__________Some students are able to find employment after graduation,other will have to return to school and earn an advanced degree.

单项选择题we are happy at the good news__________Mr.Black has been awarded the Best Manager.

单项选择题__________in the company for three year ,mark has become experienced in business negotiations.

单项选择题He was speaking so fast（）we could hardly follow him.

A．what
B．as
C．but
D．that

单项选择题Before __________for the job, you will be required to take a language test .

单项选择题Please call me back__________you see this message.