英语完形填空 讲出为什么

英语完形填空 讲出为什么
One day,a boy and his sister were sitting by a lake near their house when a bear appeared.There was __36__ place for them to get away.The children had to step back to the lake.They kept backing and the bear kept ___37___ at them.As the two children were wearing life-jackets,the boy told his _38__ to jump into the lake.But the bear 39___ them into the lake and caught the girl by the life-jacket.The boy turned back and tried to pull his sister away from the bear.
But that didn’t work.Then the boy tried growling (嗥叫) __40__ at the bear.__41_ by this,the bear let the girl go.The children scrambled ashore (爬上岸) and ran up to the house with the bear after them
The children tried to get into the house through the front door but it was _42_.With the bear right behind them,they ran _43_the house.Each time it got too _44_,the boy stopped and growled,and each time the bear stopped coming at them,allowing the children to _45_ .Finally they succeeded in entering by the back door.They phoned the police station.Two policemen came and drove the bear away.
36.A.no B.any C.some D.enough
37.A.climbing B.coming C.backing D.smiling
38.A.friend B.bear C.mother D.sister
39A.took B.brought C.kicked D.followed
40.A.sadly B.happily C.loudly D.kindly
41.A.Encouraged B.Surprised C.Disappointed D Discouraged
42 A open B moved C locked D small
43 A to B into C around D out of
44 A.far B.close C.afraid D.happy
45 A.escape B.play C .jump D.smile