阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写1 个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。
Most people know a leap year is every four years and that it has something to do with the earth circling the sun. But many may not be aware of 1.purpose of this extra day. Over the past centuries, February 29 th 2.( cause) some unusual customs, wild rumors and strange superstitions. It's all about the sun ! We grew up being told the earth takes 365 days 3.( make) a complete circle around the sun, but it takes 365 days, 5 hours, 48 minutes and 45 seconds.
阅读下列短文，根据短文内容填空。在未给提示词的空白处仅填写1 个适当的单词，在给出提示词的空白处用括号内所给词的正确形式填空。
In many states, the hardest colleges to get into receive tens of thousands of applications and accept only a few of 1.(they). These include institutions like Harvard, which admitted less than 1 in 20 of the applicants for the 2018 - 2019 school year. Such colleges are able to rely on their reputation and fame to attract students and be 2.( high) selective. Schools like these also tend to charge more 3. tuition (学费)and board.
假定你是李华，你的美国笔友 Jeff 发来邮件，说他想在暑期来中国旅行，体验中国文化和饮食， 请你用英语给他回一封邮件。内容包括：
1. 推荐旅游城市；
2. 推荐原因；
3. 祝他旅途愉快。
注意：1. 词数 80 左右；
2. 可以适当增加细节，以使行文连贯
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阅读下面两篇短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。
1. Old Tom and the other killers were fierce hunters, they never harmed or attacked people. In fact, they protected them. There was one day when we were out in the bay during a hunt and James was washed off the boat. “Man overboard！Turn the boat around！” urged George, 2. (shout) loudly.
The sea was rough that day and it was difficult to handle the boat. The waves were carrying James further and further away from us. From James’s face, I could see he was 3. (terrify) of being abandoned by us. Then suddenly I saw a shark. “Look, there’s a shark out there，” I screamed.“Don’t worry, Old Tom won’t let it near，”Red replied. It took over half an hour to get the boat back to James, and when we approached him, I saw James being 4. (firm) held up in the water by Old Tom. I couldn’t believe my eyes.
阅读下面短文，在空白处填入 1 个适当的单词或括号内单词的正确形式。
Marty is a boy who looks the same as other people but has a muscle disease which sometimes makes him very weak. Not 1. (be) able to climb stairs as quickly as others, he gets out of breath after running just a short way and he has to stop halfway up the stairs and rest 2. he can get to the top, which makes kids make fun of him. He always feels stupid for being a bit behind the others after a long 3. (absent) from school.Although doctors can’t give his disease a name and it’s difficult to know 4. the future will be like, Marty learned to adapt to his disability. His motto is: live one day at a time.
He has a busy life without time to sit around 5. (feel) sorry for himself. Besides writing and computer programming, he goes to the movies as well as football matches with his friends and spends a lot of time with his pets. His ambition is 6. (work) in the computer industry when he grows up.
This is the doctor without _______ help my father couldn’t have defeated the virus.
A.which B.whose C.that D.what
