Below are some of the expressions you have learned in this unit. Do you understand their meanings? Do you know how to use them in the proper context? Now check for yourself by doing the blank-filling exercise. Change the form where necessary. have no idea in reverse slip over get the hang of make a difference r u n into concerned with mull over live through 1) You may feel awkward when you start learning how to drive, but it’s easy once you ____________________ it. 2) As one of those who ____________________ two world wars, Uncle Sam understands the value of life far better than his grandchildren. 3) When you are learning driving a car, it ___________________ whether you have a good teacher or not. 4) He is so stubborn. We __________ how to persuade him to accept our proposal. 5) Be more ___________ your character than your reputation( 名声 ), because your character is what you really are, while your reputation is just what others think you are. 6) To our surprise, Mr. Thompson __________ an important point in his analysis — the cause and effect of the problem. 7) To my pleasant surprise, I __________ my best friend Helen in Paris last week. 8) I hit the tree behind me when I put the car __________ without looking back first. 9) I’ll leave you alone here so you can ____________ the problem and make a decision on your own.