单词分类
A. frustrating      B. do more exercises  C. listening to tapes  D. excited    
E. boring         F. asking questions    G. bored           H. watch movies
I. frustrated       J. getting an English tutor
(1)The game is so____  that I can’t stand it.
(2) After having a Chinese class, I felt ____ .
(3) I’d like to learn English by ____ .
(4)Do you think learning by surfing the Internet is good or bad? Why?
____ 

如图为细菌结构的示意图，请根据图回答下列问题．

若规定“*”的运算法则为：a*b=ab-1，则2*3=____．