17.A string of earthquakes shook the town, sending villagers tripping and falling as they ran from t
18._____ are not leached out of soil，reclamation procedures are need to restore the land’s productiv
19.Not until Kentucky’s Mammoth Cave had been^completely explored in 1972 _____.(A)when was its full
20.Plankton,_____, is the basic foodstuff for everything that lives in the ocean.(A)comprise both mi
Reading 1One of the most breathtaking natural occurrences is the northern lights or aurora borealis.
【題組】22.Where do the northern and southern lights occur?(A)In outer space.(B) In the earth’s magnetic
【題組】23.The northern lights is essentially(A)a discharge of electromagnetism from charged particles.(
【題組】24.What happens to the sun’s subatomic particles when they approach(A)They are absorbed into the
Reading 2Moths and butterflies are common insect that live in your garden. They don’t have skeletons
【題組】27.According to die passage, what are the bodies of moths and butterflies similar to?(A) A shell
【題組】28.Why does Darwin，s hawkmoth need such a long proboscis?(A)The flowers grow far away from where
【題組】29.Why do butterflies sometimes stomp up and down on leaves?(A)They look for the flower nectar t
【題組】32.Why is soccer such a socially significant sport?(A)Because it causes different groups of peop
【題組】33.How often is the World Cup held?(A) Every year.(B) Every three years. (C) Every four years. (
【題組】35.What was remarkable about the large audience for the World Cup final in 2006?(A)It was made u
Reading 4DNA technology, the science of identifying people from their genetic codes, has made a prof