_ what to do, he decided to go to Mr Black for help.
(A)Not knowing
(B) Not having known
(C) Knowing not
(D) Having not known
The Correct Answer
Most of us senior students are able to __ a conversation with people from English-speaking countries.
（A）go on（B） keep on （C） carry on （D） hold on
Correct Answer: C
You are going to graduate soon,Mark. ---Yes,but I’llour school.
（A）be friends with （B） be thankful to （C） be glad to （D） be hard on
Correct Answer: B
_____ for the timely investment from the general public, our company would not be so thriving(兴旺的) as it is.
（A）Had it not been （B） Were it not （C） Be it not （D） Should it not be
Correct Answer: A