Cable TV began in 1948 in the USA, but it took 50 years________ 66 percent of American households had it.A. before B. after C unless D. since
More and more teaching _______ are being developed across the globe, which are sure to _______to make classroom teaching more lively and interesting.
Everybody on the spot was deeply touched by the bravery of the young girl who took off her only blouse, _____ the burns and ______ the mouth-to-mouth method to save the man who was in a coma(昏迷) because of a bad electric shock.
People like to live a life full of ________ and there are _______ of life styles available for people to choose in the modern world.
In my dream I felt it hard to breath as if somebody ________ from the distance
I have experienced quite a number of cases ______ I really wanted to help but could not find anything to _______.