单项选择题

A．They are accurate and easy to pull.
B．Their shooting range is 40 yards.

C．They are usually used indoors.

D．It took 100 years to develop them.
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单项选择题
A．He sold cola to doctors. B．He was a drug store clerk. C．He suffered from severe headaches. D．He developed the cola syrup.
A．He sold cola to doctors.
B．He was a drug store clerk.

C．He suffered from severe headaches.

D．He developed the cola syrup.
单项选择题
A．Teach Don’s class while he’s absent. B．Give Professor Webster the key to Don’s office. C．Leave a message on the board in Don’s classroom. D．Bring Don the homework that was due that day.
A．Teach Don’s class while he’s absent.
B．Give Professor Webster the key to Don’s office.
C．Leave a message on the board in Don’s classroom.
D．Bring Don the homework that was due that day.
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