John boasted that he could finish the job all by himself in no time.（）

单项选择题It is imperative for the Chairman to look into this master personally.（）

A．necessary
B．urgent
C．useful
D．impossible

单项选择题“I really think there must be something rather fishy somewhere,don't you”（）

A．smelling of fish
B．tasting of fish
C．suspicious
D．delicious