单项选择题
The conference has been held to discuss the effects of tourism ______ the wildlife in the area.
单项选择题 It was in the year of 2002______they set up a branch company in China.
单项选择题 It"s reported that the city will receive about 10,000 ______ on May 1.
单项选择题 The price of petrol ______ sharply since last month.
