单选题By the time you arrive this evening, ______ for two hours. A. I will study B. I will have been studied C. I had studied D. I will have been studying

单选题The animals, highly sensitive to pollution, can ______ monitors of water quality.

单选题How did the other guests feel when the man was eating his peas with a knife?

单选题Here's my card. Let's keep in______.

单选题He didn't want to retire at an early age and lead a (n) _____ life.

单选题Wait a moment, please. Richard will be back ______.

单选题I appreciate ______ the opportunity to study abroad two years ago.

单选题The special departments protect customers and workers in many ways EXCEPT　　by _________.

单选题The twins are so much ______ that it is difficult to tell one from the other. A. similar B. equal C. like D. alike

单选题Ten minutes ______ too short a time to finish this test. A. is B. are C. has D. have

单选题His brother had become a teacher, ______ he wanted to be. A. who B. what C. which D. that

单选题I objected ______ the meeting without him.

单选题______ all behavior is learned is a basic assumption of social scientists.

单选题We live in a time ______, more than ever before in history, people are moving about.

单选题{{B}}Passage 50{{/B}} Young men often give flowers to young women when they are in love. This tradition may have come from Turkey. In the 1700s in Turkey, it was quite popular for people in love to send each other baskets full of strange things. The baskets were delivered secretly to the person who was receiving it. Usually, an old woman who sold flowers or fruit on the street left the basket beside the person's door. These baskets included a variety of "gifts": flowers, stones, feathers, wax, and even charcoal. Each thing in the basket had a special meaning. By figuring out the secret message contained in each item, the person who received the basket began to understand little by little the true feelings of the person who sent it. (50) {{U}}This idea of sending gifts of love with secret meanings quickly spread to Germany, France and England.{{/U}} However, as time passed, only sending flowers remained popular. An innocent bunch of flowers told young ladies about the feelings in the hearts of young men. Each different flower held a different meaning. For example, the flowers from an orange tree meant, "You are beautiful and pure." Pink carnations meant, "My love for you is strong and great." Yellow roses, on the other hand, meant, "I saw you with someone else. " Many flower dictionaries were made to help young people in love understand the meaning of the flowers they received. Not all of the dictionaries agreed, however, on the meaning of each flower, so a person had to be careful about the flowers they chose to send. By the 1880s, using flowers to send messages had fallen out of fashion, and the more direct way of sending love letters began. Today, flowers are still considered a lovely gift, but the meaning for each kind of flower has been lost.

单选题I didn' t know What to do but then an idea suddenly ______ to me. A. occurred B. appeared C. happened D. struck

单选题Julia likes to rent a house, which is comfortable, well-equipped and, _____, in a quiet neighborhood.

单选题We have not decided which hotel______ A. to stay at B. to stay C. staying at D. for staying