题目内容
--Why are your eyes so red? You ________ well last night.
--Yes, I stayed up late writing a report.
A. mustn’t have slept B. can’t have slept
C. couldn’t sleep D. might not sleep
B
【解析】
试题分析:考查情态动词和虚拟语气。句意:--你的眼睛为什么很红?--昨晚你不可能睡得很好。--是的,我熬夜在写一份报告。情态动词+have done表示对过去的事情进行虚拟,mustn’t不能表推测,排除A;must一定,表示肯定推测,否定推测用can’t;must have done一定已经做了某事;can’t have done不可能已经做了某事;might not have done可能没有做某事;should/shouldn’t have done本应该/不应该做某事;need/needn’t have done本需要/不必做某事。这里表示否定的推测,即一定没有睡好,故选B。
考点:考查情态动词和虚拟语气

Frederick M. Hess is the director of education policy studies at the American Enterprise Institute, which is a nonprofit organization that conducts research on many public issues. He says that a long summer vacation doesn’t make sense in today’s world.
Can American students afford to take a summer vacation? In a summer vacation, millions of kids spend valuable time sending messages, watching TV, playing video games and doing shopping in the mall. They will also be putting their academic futures at risk.
Summer vacation once made sense in the past when you didn’t need an education to get a good job. But now things have changed. For today’s students, academic skills are important to students’ future success, but such skills are affected in the summertime. Many nations don’t give kids an American-style summer vacation. They offer no more than seven consecutive(连续的) weeks of vacation. Most American school districts offer up to thirteen weeks. To compete in the global marketplace, Americans must be prepared to go up against international competitors.
Summer vacation also causes challenges for today’s families. In the 1960s, more than 60% of families had a stay-at-home Mom. Now two-thirds of American children live in households where every adult works. For these families, summer vacation can be more burden than break. Someone must watch the kids.
But the biggest problem may be how summer vacation hurts academic achievement. Researchers have found that disadvantaged students lose significant ground in the summertime.
A longer school year does not have to be an invitation to hard boring work. Rather, it should allow time-pressed teachers to conduct richer and more imaginative lessons. Schools would have more time to devote to athletics, languages, music and the arts. Summer vacation can be a grand thing. But in the 21st century, it may also be outdated.
Title: Summer Vacation
Theme | A long summer vacation isn’t 1. in today’s world. | |
Basic Information | 2. length | 13 weeks in most American schools |
Students’ 3. | ·Sending messages and watching TV ·Playing video games ·Doing shopping | |
Disadvantages | ·4. student’s academic skills and putting academic futures at risk. ·Being a 5. to families for they have to watch kids. ·Hurting students’ academic achievement and resulting in 76 significant ground. | |
Suggestion | A longer school year does not have to 6. to hard boring work. Richer and more imaginative lessons should be 7. , such as athletics, languages, music and the arts. | |
8. | Though being a ground thing, summer vacation might be out of 9. in the 21st century. | |