have trouble in doing sth 和 be used as 和 the number of 和 a number of 造两句 都造两句

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have trouble in doing sth 和 be used as 和 the number of 和 a number of 造两句 都造两句
have trouble in doing sth 和 be used as 和 the number of 和 a number of 造两句 都造两句

have trouble in doing sth 和 be used as 和 the number of 和 a number of 造两句 都造两句
He has trouble in speaking English.
Shell was used as money many years ago.
The number of his office is 2012.
A number of studens are playing on the playground.