单选题 Mobile telecommunications ______ is expected to double in Shanghai this year as a result of a contract signed between the two companies.
A. potential B. possession C. impact D. capacity

【正确答案】 D
【答案解析】potential意为“潜力，潜能”，指成长、发展或形成的内在能力或才能； possession意为“拥有，占有”；impact 意为“影响，冲击”；capacity意为“容量，负载量”，指所能容纳的最大量。Mobile telecommunications 修饰所填之词，所以应选capacity。