一级市场由( )三个元素构成。
A．证券发行者
B．证券管理者
C．证券承销商
D．证券投资者
E．证券流通者
参考答案：A,C,E
The final exam is a battle _______ everybody wants to show off his or her talent.
A．that
B．what
C．where
D．when
—You see, “Food Safety” receives thousands of Internet hits a day.
—Obviously, it has become one of the________ topics recently.
A．interesting
B．hot
C．most interesting
D．hottest
