If a teacher gets an incorrect answer from students，it is most appropriate for him or her to say“__________”in order to encourage them．

单项选择题Student：I’m very down．My dad get seriously ill last week，and l’m…Teacher：N0．Not get．Say got because it’S in the past．The conversation above shows that the teacher__________．

单项选择题Writing exercises such as completion，reproduction，compression，and translation are mainly the type of exercises used in__________．