用简便方法计算，要写出简算过程
|
（1）
-（3.19+31 7
），3 7
=
-31 7
-3.19，3 7
=4-3.19，
=0.81；
（2）94×99，
=94×（100-1），
=94×100-94×1，
=9400-94，
=9306；
（3）（
-4 5
）÷3 4
+0.8，1 25
=
÷1 20
+0.8，1 25
=
+0.8，5 4
=2.05；
（4）10-
÷9 13
+5.2，3 26
=10-6+5.2，
=4+5.2，
=9.2．
| 完形填空 | ||||
| On Monday at 2: 35 p.m., a bus full of passengers was going to Bungalow.It was so 1 that you had to struggle even to get room to stand- 2 about a seat. At one stop, an old lady 3 the bus.She looked tired and I thought she was not 4 also.After a few minutes, her 5 were shaking slightly.She was looking around to find a 6 .She asked a few guys to let her sit because she had a problem of arthritis (关节炎)in her knees. 7 responded to her positively, so she was feeling helpless. I noticed she was facing a lot of 8 and she was trying to hide it but did not 9 .I was thinking of giving her my seat, but was fighting in my mind about why I should give her my seat.I 10 it myself: Because she is old and it's my duty to help her.But I 11 that this is Mumbai (孟买), where to help anybody may be dangerous.I was hesitating (犹豫)about it. Before I asked the lady to take my seat, an old man stood and 12 her his seat.The man, who traveled his rest journey standing, had only one leg. I found myself in an ocean of 13 and guilt-why didn't I help her?My journey ended but I still regretted that I wasted my time in thinking when it was the right thing to do. Now I 14 travel by bus and have decided to never waste time in thinking to help anybody whatever it results in.I will help although it is 15 to actually do. | ||||
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