_____ we are faced with, we will have no choice but to unite and overcome them.
A.However tremendous difficulties
B.However tremendous some difficulties
C.Whatever tremendous difficulties
D.Whatever tremendous the difficulties
The efforts made by researchers ____ possible the appearance of a new life-saving medicine.
A.were made B.made
C.made it D.were made it
Have you ever heard such stories about those loyal dogs ____ in this book?
A.as they are described B.that they are described
C.as are described D.that are described
假定你是红星中学的李华，你的英国朋友Peter热爱体育运动，他将作为交换生到你校学习一年。请你给他写封邮件，主要内容包括:
1. 介绍你校体育课程及活动;
2. 推荐一项中国传统体育项目。
注意：1.词数100左右；
2.可以适当增加细节，以使行文连贯。
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文中共有10处语言错误，每句中最多有两处，每处错误涉及一个单词的增加、删除或修改.
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词.
删除：把多余的词用斜线（ \ ）划掉.
修改：在错的词下划一横线，并在该词下面写出修改后的词.
注意：1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分.
My friend Lilly and I were on the way back to home from school when we saw a boy fall off his bicycles. The boy lay on the ground， screamed in pain. We rushed to help and found if the boy's left leg was bleeding. It happened that we have learned some knowledge about first aid before， so we knew how we should do. We dialed "120" and called an ambulance. While waiting it， I took out my handkerchief and pressed them onto the bleeding point. Then we rolled the boy onto one side but put him in the recovery position. We stayed with him until the ambulance arrived 5 minutes late.
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。
Are energy drinks safe? In spite of the dangers 1. (know) to us all, the market for energy drinks is booming. The Global Energy Drink market 2. (expect) to teach $72 billion by 2024. This is great news for energy drink producers, 3. what are consumers really getting when they buy these drinks?
Energy drinks can cause dehydration (脱水). The main source of energy in most energy products is caffeine, 4.increases urine (尿) production. People shouldn’t consume more than 400 mg of caffeine per day, but energy drink producers are not required by draw 5. (list) the amount of caffeine their products contain.
Energy drinks can increase heart rate. Caffeine contributes 6. a heart rate risk, says nutritionist Lisa Cohn, who found that energy drink abuse among teens 7. (cause) increased risk of heart attack, especially in those with potential heart conditions
Energy drinks can damage 8. (tooth) Most energy products contain large amounts of citric acid (柠檬酸), which is particularly 9. (harm) to enamel (牙釉质). In fact, the 10. (lose) of enamel after exposure to energy drinks is more than twice higher than after exposure to sports drinks.
