单选题"What makes her so unhappy?" "______ one of her favorite books."

单选题Not until a monkey is several years old ______ to exhibit signs of independence from its mother.

单选题The newly promoted assistant manager expressed a wish to be ______ to the London branch.

单选题I don't think about my old home very much, only ______ and then.A. nowB. everC. thenD. again

单选题He spoke English so well that I took it ______ that he was an American.

单选题(Now that) he is working (much harder), I don't think he'll (have any trouble)(to pass) the entrance exams.

单选题His sickness, ______ with terrible weather, has completely ruined this long expected trip.

单选题Speaker A: Waiter, ______ Speaker B: Wait a minute, sir. That"s $80 altogether.

单选题There is an (increasingly) amount of evidence (that) more and more young people (are taking) an active interest (in) politics.A. increasingly B. that C. are taking D. in

单选题During a trip to observe wild animals in Africa, I encountered the least brave animal on earth, the wildebeest(角马). I sat on a riverbank for three hours watching a group of thousands build 1 the courage to drink water. More than a million wildebeests 2 northward into the wetlands. It is a long, dry and difficult journey. Frequently, the only available water is the Grumeti River, 3 represents both life and death. Unlike some creatures that can take moisture 4 the grass they eat, wildebeests must drink from the river to live. The river supports other wildlife, including 5 that kill and eat other animals. Though thirsty 6 traveling, the wildebeests stand back from the water, sensing possible danger. Moving slowly toward the bank can 7 hours, as an individual wildebeest steps forward, steps back and then carefully steps forward again. More wildebeests gather together and advance, gradually pushing the leaders to the river, 8 they want to go or not. It"s been a long time 9 they drink last time, and you feel their anxiety for water. Lions are possibly on the 10 , saving energy as they wait for an opportunity for lunch. Once the large group moves to the river, lions could 11 , making the group running in a wild and uncontrolled 12 . The mad rush would raise a dust cloud that blocks the 13 of the wildebeests nearby. A kill is almost guaranteed. Sitting on that riverbank, I noticed that a young wildebeest finally stepped ahead and drank while the 14 adults held back. Soon, others began drinking. But 15 lining up along the bank, taking turns, they gathered and pushed. Some had to walk farther into the water than they were 16 to go. Those pushed farther in water got frightened and in 17 frightened the others. They all retreated hastily and returned to their route. Only the few that were 18 enough got a drink. The others went 19 . There was no danger that day. Only the wildebeests" fear and 20 of courage kept them from drinking.

单选题Since he left the university, he ______ in an accounting company.

单选题Why not ______ Professor Li for help? He is kind-hearted and willing to help.

单选题______ was unimportant.A. Whether he enjoyed our dinner or notB. No matter how he enjoyed our dinnerC. If he enjoyed our dinnerD. What he enjoyed our dinner

单选题To succeed in a scientific experiment, ______.

单选题In modern society, knowledge is to us _____ water is to life.

单选题They've ______ on a trip round the world. A. left away B. begun C. set off D. started up

单选题I must work hard, however I'll fail in the exam.

单选题Having no money but ______ to know, he simply said he would go without dinner.