（m+3）（-m-3）等于[ ] A.m2-9 B.m2-6m-9 C.-m2-_爱下问搜题

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问题选择题

（m+3）（-m-3）等于[ ]

A.m²-9

B.m²-6m-9

C.-m²-6m-9

D.-m²+6m-9

答案

答案：C

选择题

In recent years, the economy of our country____________ rapidly. [ ]

A. is increased

B. has increased

C. increased

D. has been increased

完形填空

Only once a year, on his birthday, did Charlie Bucket ever get to taste a bit of chocolate（巧克力糖）. The whole family 1_____ up their money for that 2____ occasion（时刻）, and when the great day arrived, Charles was always 3_____ with one small chocolate bar（条）to eat 4_____. And each time he 5_____ it, on those wonderful birthday mornings, he would place it 6_____ in a small wooden box that he 7_____, and treasure it as though it were a bar of solid 8______; and 9____ the next few days, he would 10_____ himself only to look at it, but never to 11____ it. Then at last, when he could 12____ it no longer, he would peel（剥）back a tiny 13_____ of the paper wrapping at one corner to 14______ a tiny bit of chocolate, and then he would take a tiny nibble（轻咬）——just enough to allow the lovely sweet taste to 15_____ out slowly over his 16_____. Then next day, he would take 17_____ tiny nibble, and so on, and so on. And 18____this way, Charlie would make his six-penny bar of birthday chocolate 19_____ him for more than a 20_____.