单项选择题

A．They used bricks and they are too heavy.
B．They used bricks that were too expensive.
C．Steel was in short supply.
D．The benefits of steel were unknown to them.
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单项选择题
A．He’s quit the band for academic reasons.B．He didn’t enjoy being a member of the band.C．He’s getting academic credit for being in the band.D．He’s taking time off from his studies to join the band.
A．He’s quit the band for academic reasons.
B．He didn’t enjoy being a member of the band.
C．He’s getting academic credit for being in the band.
D．He’s taking time off from his studies to join the band.
单项选择题
A．They are more likely to damage the cave.B．It’s hard for them to stay awake.C．They tend to break their equipment.D．They may imagine seeing things that aren’t really there.
A．They are more likely to damage the cave.
B．It’s hard for them to stay awake.
C．They tend to break their equipment.
D．They may imagine seeing things that aren’t really there.
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