单项选择题

A．A flood wall was built.
B．Rescue teams were formed.
C．An alarm system was set up.
D．50 underground stations were made waterproof.
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单项选择题
A．Michael has been diving for nine years.B．Michael dives on holidays with his parents.C．Michael loves diving ever since he first tried it.D．Michael has never taken any diving courses.
A．Michael has been diving for nine years.
B．Michael dives on holidays with his parents.
C．Michael loves diving ever since he first tried it.
D．Michael has never taken any diving courses.
单项选择题
A．Set the dinner table.B．Change the light bulb.C．Clean the dining room.D．Hold the ladder for him.
A．Set the dinner table.
B．Change the light bulb.
C．Clean the dining room.
D．Hold the ladder for him.
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