单项选择题

A．To see what would happen if the plane exploded in the water.
B．To see how much air passengers need to breathe at certain altitudes.
C．To find out if there are any weak parts that would burst under pressure.
D．To find out how much air can be pumped into a plane.
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单项选择题
A．Because the telegram was a false one.B．Because this telegram was not addressed to him.C．Because his uncle wasn’t ill at all.D．Because it was somebody else that was iii.
A．Because the telegram was a false one.
B．Because this telegram was not addressed to him.
C．Because his uncle wasn’t ill at all.
D．Because it was somebody else that was iii.
单项选择题
A．They go to a regular school.B．They attend a special school.C．They are taught by (heir parents.D．They have a private tutor.
A．They go to a regular school.
B．They attend a special school.
C．They are taught by (heir parents.
D．They have a private tutor.
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