单项选择题

A．Helping the needy to survive.
B．Sharing risks of possible losses.
C．Being compulsory in most countries.
D．Covering differently according to different situations.
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单项选择题
A．He was the first person to appear on television.B．It was he who discovered the wonder of television.C．He made the very first step towards the invention of television.D．He developed the television and was the first person to demonstrate it.
A．He was the first person to appear on television.
B．It was he who discovered the wonder of television.
C．He made the very first step towards the invention of television.
D．He developed the television and was the first person to demonstrate it.
单项选择题
A．Mark the latest homework assignment.B．Put a cancellation notice on the classroom door.C．Make an appointment with the doctor.D．Return some exams to his students.
A．Mark the latest homework assignment.
B．Put a cancellation notice on the classroom door.
C．Make an appointment with the doctor.
D．Return some exams to his students.
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