Questions 47 to 56 are based on the following passage.
California has more than two thousand (47) of plants
that are not found anywhere else. A new study says climate change could
severely (48) these plants by the end of the century. Many
could move northward and toward the Pacific coast in reaction to rising
temperatures and (49) in rainfall. Others might climb
up mountains to find the cooler climates they like. But David
Akeley at the University of California, Berkeley, says the (50)
of climate change is greater than during ice ages in the past.
He says plants that cannot move fast enough are in (51)
of getting killed off before they can relocate. Changes in plants
could also affect animals that depend on the plants for food.
About forty percent of all (52) plants in California
are endemic, meaning that they are found only in that state. The new study says
that for two out of three endemic plants, the areas where they are found
could (53) _ by more than eighty percent. That, they say, is the
worst possible case. The researchers point out that there are
many things they cannot be sure about. That (54 how much
warming to expect in the future from (55) of heat-trapping
greenhouse gases. Also, they cannot be sure what will happen to (56)
species of plants. A) effect I)
includes B) speed J) affect C)
express K) shrink D) kinds L)
sure E) types M) release F) changes
N) species G) individual O)
native H) danger