Have you everwritten (写)a letter to your parents? 题目和参考答案——青夏教育精英家教网—

题目内容

13．Have you everwritten （写）a letter to your parents？

分析你曾经给你的父母写过信吗？

解答答案：written．现在完成时表示动作在过去发生，对现在有影响．构成：have/has+过去分词，经常和ever，never，already等词连用．根据"Have you ever"以及汉语提示"写"，可知要用"write"过去分词形式来构成现在完成时，故填written．

点评首先要掌握现在完成时的用法，然后结合具体的题意以及给出的汉语提示，就可以确定正确答案．

练习册系列答案

6．---I wonder if these are Jim's glasses．
---They ____be his．He doesn't wear glasses．（　　）

1．阅读短文，从每题所给的ABC三个选项中选出最佳答案回答问题或完成句子．
When the traffic lights turn red，we will stop driving a car or crossing a street．Why is red used for traffic lights instead of other colors？
As we know，scattering （散射） happens when light goes through the air．For the same media（媒质），if the wavelength is long，the scattering will be short．If the wavelength is short，then the scattering will be long．
Of all lights we can see red has the longest wavelength，so the scattering is the weakest．That means the red light travels far．In fact，it travels farther on rainy days．
Using the red light can help drivers in farther areas sec the lights．It helps drivers stow down or stop in lime．If drivers don't see the red light until they are close，they may not be able to stop the car in time．An accident may happen Red can also excite people．We can act more quickly when we see the color red．In a word，red lights help drivers stop in time and help prevent accidents．

46．When the traffic lights turnA，we will stop driving a car．
A．red    B green     C．yellow
47．According to the passage，the scattering of the red light is theB．
A．longest    b．weakest       C．farthest
48．The underlined word"wavelength"meansC in Chinese．
A．波浪        B．光波      C．波长
49．What can the red light help drivers do？C
A．It can help drivers in farther areas see the lights．
b．It can help drivers slow down or stop in time．
C．A and b
50．Which of the following is the best title？C
A．Why do accidents happen
b．How does the red light travel
C．Why do we use red traffic lights．

8．It's my cousin'stwenty-third （第二十三个）birthday next week．

18．Sorry，I didn't follow you．Would you please speak moreclearly （清楚地）？

5．Yesterday was thehottest （hot） day of the year．

2．My aunt will arrive in Guangzhou _______ morning of July 15．（　　）

3．-Jim goes to help in the food bank every Sunday．
- kind boy he is!（　　）

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