单选题The first use of atomic weapons was in 1945, and their power _____ increased enormously ever since.
单选题A good teacher is able to _____ a complicated idea in very simply terms.
单选题Our English teacher requested that the homework _____ tomorrow morning.
单选题_____ to meet anybody, he went in from the back door.
单选题The child has a(n) _____ disease which attacks the immune system.
单选题The negotiators believe that it is _____ both parties to establish a joint venture in Shanghai.
单选题Professor Li _____ in doing his experiment for nearly ten years.
单选题The pollution problem as well as some other issues will be discussed when the Congress is in _____ again next spring.
单选题It’s high time our government _____ something to stop polluting our environment.
单选题James Joyce’s novels are difficult to understand and impossible _____ into another language.
单选题People throughout the world are eating _____ meat per person as they did in 1945.
单选题We won’t encourage him to do that _____ he is in good health.
单选题But for her mother’s sudden illness, she would never think of breaking this _____ with you.
单选题Turn on the television or open a magazine and you _____ advertisements showing happy families.
单选题The rainstorm has damaged the crops. The loss has not yet been _____ accurately, but it is believed to be well beyond a million dollars.
单选题The house _____ at a very good price.
单选题The last half of the nineteenth century _____ the steady improvement in the means of travel.
单选题My passport _____ last month, so I will have to get a new one.
单选题The government _____ a heavy tax on luxury goods.
单选题My sister will be here tomorrow, but at first I thought that she _____ today.