单项选择题

To tell you the truth, it’s very hard for us to help them get rid of Internet addiction. But we（）on this problem trying to improve the situation.

A. worked
B. had worked
C. are working
D. had been working

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单项选择题
What’s the relationship between the two speakers（）

A. Wife and husband.
B. Teacher and student.
C. Clerk and guest.
D. Employer and employee.
单项选择题
Where is White going to borrow money（）

A. From the bank he is working for.
B. From his friends.
C. From another bank.
D. From his office.
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