34. The experiment shows that the infested plant helps its neighbors by

______

A. making more Hex Vic to attract the pest

B. releasing Hex Vic into the air to warn them

C. letting them know how to produce Hex Vic

D. producing enough Hex Vic to kill the pest

35.What may be the best title for the passage?

A. Survival of Plants B. Plant World

C. Talking Plants D. Plant Bug Killer

Passage Four

Vancouver is the best place to live in the Americas, according to a quality-of-life ranking published earlier this month .The city regularly tops such indexes as its clean air, spacious homes and weekend possibilities of sailing and skiing. But its status as a liveable city is threatened by worsening congestion(拥挤).Over the next three decades, another I million residents are expected to live in the Greater Vancouver region, adding more cars, bicycles and lorries to roads that arc already struggling to serve the existing 2.3 million residents.

A proposal by Vancouver’s mayorseeks to prevent the worsening conditions.

Upgrades would be madeto 2,300 kilometres of road lanes, as well as bus routes and cycle paths. Four hundred new buses would join the fleet of 1,830. There would be more trains and more “sea bus” ferry crossings between Vancouver and its wealthy northern suburbs. To get all that, residents must vote to accept an increase in sales tax, from 7% to 7.5%. Polls suggest they will vote no.Everyone agrees that a more efficient transport system is needed. Confined by mountains to the north, the United States to the south and the Pacific Ocean to the west, Vancouver has spread in the only direction where there is still land, into the Fraser Valley, which just a few decades ago was mostly farmland.

The road is often overcrowded.Yet commuters’suspicion of local bureaucrats may exceed their dislike of congestion. TransLink, which runs public transport in the region, is unloved by taxpayers. Passengers blame it when Skytrain,the light-rail system, comes to a standstill because of mechanical or electrical faults, as happened twice in one week last summer, leaving commuters stuck in carriages with nothing to do but expressing their anger on Twitter. That sort of thing has made voters less willing to pay the C$7.5 billion in capital spending that the ten-year trafficupgrade would involve.Despite the complaints, Vancouver’s transport system is a decent, well-integrated one on which to build, reckons Todd Litman, a transport consultant who has worked for TransLink. “These upgrades are all-important if Vancouver wants to maintain its reputation for being a destination others want to go to.”He says.

36. The biggest problem threatening Vancouver as a liveable city is .

A. increasing congestion

B. climate change

C. shortage of land

D. lack of money

37. The upgrade proposal by Vancouver’s mayor may be turned down by residents because .

A. they do not want more people to move in

B. they are reluctant to move to new places

C. upgrades would take away their living space

D. upgrades would add to their financial burdens

38. The only direction for Vancouver to further expand is towards .

A. the east

B. the west

C. the south

D. the north