A．sinceB．ifC．BecauseD．while__________Some students are ……

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.

单项选择题As the price of oil keeps__________,people have to pay more for driving a car.

单项选择题Only when we hurried to the airport__________the flight was canceled.

单项选择题John had never been abroad before, __________he found the business trip very exciting.

单项选择题How much does it __________to take the online training course

单项选择题In the long run it is far cheaper to__________the needs of poor people than to ignore them.