Good news-two of our classmates ______ intoTsinghua University in advance!

____seems very hard to reach the top of the mountains.

While shopping, you should make your own decision. You cannot simply depend on __________ is advertised on TV

E- mail is very popular today. People seldom write letters now, _________

US First Lady Michelle Obama encouraged（鼓励）students to study abroad in her ____when visiting Peking University (北京大学) on March 22, 2014.