(1) (language / foreign / requires /a/ mastering) a lot of time and energ
(2) (to / expect / little sons / my / I) be considerate in the future.
(3) The students ( being / of / exams / my / complained ) too difficult.
(4) ( hard / it / Lucy / was / to / for) make sense of his story.
(5) He wants to make ( cookware / to / children / use / for) easily.