Ⅰ.单句语法填空
1．(2019·吉林省吉林市一次调研)Well，we certainly know from evidence in the sleep center and that of many other scientists that naps can give you benefits for both your brain and your body.
2．In other words，it hasn't been clear whether kids who weigh too much have trouble sleeping，or whether sleeping less leads to weight gain.
3．They had no sooner finished the survey by asking the parents the same questions three years later than they found that 18 percent of kids involved in the study were obese.
4．(2019·河北衡水中学一调)Though/Although/While the event will cost the government a lot，the benefits are easy for us to see.
5．(2019·江西红色七校二次联考)Yesterday was a crazy day. I felt very tired because I had tons of work stuff going on.
6．(2019·河南天一大联考二次考试)Although/Though/While the exact boundary between primary and secondary education varies from country to country，it is generally around the seventh to the tenth year of schooling.
7．(2019·河北武邑中学期末)When we reached the Mall，I gave him the money and the smile as requested and added a gentle pat on his back.
8．Talking about fires can be scary because no one likes to think about people getting hurt or their things getting burned.
9．The Great Wall winds its way from west to east，across deserts，over mountains，through valleys till/until at last it reaches the sea.
10．Around 7：30 a．m.，she was lying on her surfboard with her left arm in the water when_ a 14footlong tiger shark attacked her，severing her left arm just below the shoulder.
