________ money, people usually tend to spend more than they have to.
31. At that time I still felt ______ my feet were cold and _______ my hands ached terribly.
30.The problem lies in ______ the mist may become a thick fog , making the situation even worse.
29. Do you think ______ possible for her to work out the difficult problem all by herself?
28. There is no doubt ______ you will be successful in time as long as you study hard.
27. He often thinks of ______ he can do more for his country, so he is highly spoken of by the people throughout the country.