赞题库-背景图
单项选择题

A．He is late for his work on the first day.
B．It takes a long time for him to go to work.
C．He is very excited for driving to work.
D．He drove to make sure the time to get to work.
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单项选择题What can be inferred about the man’s brother

A．He does the work of making maps.
B．He is reliable on giving directions.
C．He is a Geographic specialist.
D．He knows more than a computerized map.

单项选择题What do we learn about a stem cell

A．It has no difference from other cells.
B．It can only become a certain type of cell.
C．It can’t become a kidney cell.
D．It maintains and repairs the body.