US First Lady Michelle Obama encouraged students to study abroad in her when visiting Peking University on March 22, 2014.
-This dress was last year’s style.-I think it still looks perfect____ it has gone out this year.
-What do you think of my answer to the questions?-Sorry. What’s that? I______ about something else.
The pupils hurried to the classroom______ the bell rang.
Yesterday I was just to go out _____ someone telephoned me.
A boy with two dogs_____ when the earthquake rocked the city.