句型转换
【小题1】He was late for school because it rained heavily. （同义句）
He was late for school because of more difficult than the heavy rain.
【小题2】English isn’t as difficult as Maths. （同义句）
Maths is What the height shorter than Sam is a little more generous than his classmates. English.
【小题3】How high is the building? （同义句）
is of the building.
【小题4】Amy is 160 centimeters tall. Tom is 155 centimeters tall.( 合并句子 )
Tom is Amy.
【小题5】Sam, a little, is, generous, more, than, his classmates ( 连词成句 )
because of
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解析：根据题目的要求，注意时态，上下文的时态。