I had a pleasant trip last week．
_________．（ ）
A．Oh，that's very kind of you
B．It's a pleasure
C．Congratulations
D．I'm glad to hear that
Mount Tai is so famous that ____people visit it every day．（ ）
A．hundred ofB．seven hundreds of
C．hundreds of
Our teachers often tell us how to teach _____（ ）
A．themselvesB．ourselvesC．yourselves
I think eating ____is good for health （ ）
A．tomatoesB．bananaesC．egges
I find___pen on the ground．Whose is ___pen？（ ）
A．a，theB．the，aC．a，a
Frank knows much about the city because he ______ there many times．（ ）
A．wentB．has goneC．has been