With my money ______, I went back home.

Tom kept quiet about the accident ________ lose his job.

The students in the class were _____four groups before they started the game.

Along with the letter was his promise _____he would visit me this coming Christmas.

Only then ______the importance of my health.

The school _________ we met a famous scientist is not big.

------- Is this Mr Lee ’s dictionary?

------- It ___________. Look! His name is on the cover.

--It ’ s said that all the hotels are filled with tourists.

- -Don’ t worry! I _________ a room in Mianzhou Hotel.

第二类间断点个数()

设A,B,C为三个随机事件 ,且P(A)=P(B)=P(C)=1/4,P(AB)=0,P(AC)=P(BC)=1/12,则A,B,C中恰有一个事件发生的概率为()