the T-shirt costs him more than 100 yuan.(写出它的同义句）

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The T-shirt costs him more than 100 yuan.
= It costs him more than 100 yuan to buy the T-shirt.
= He pays more than 100 yuan for the T-shirt.
= He spends more than 100 yuan on the T-shirt.
= He spens more than 100 yuan (in) buying the T-shirt.
注：more than还可以换写成over；
（ ）表示其内部分可以省略不写.

He spends more than 100 yuan on the T-shirt.
权作参考，还是上个答案好一些。

he pays more than 100 yuan for the T-shirt .