My dad specializes in history
Please see to it that hand in our homework on time
He speech too nervous about middle unexpectedly was stuck for temporary ,not knowing what to say.
In essence,he is an honest man
Eat something very good,it is true of service and good quality.
Who is to preside over the meeting hasn't been decided.
第三个有点语法不确定,不过意思对着,其他保证正确.哈哈.