11.She has got used to ________ milk through a straw though she is only two months old. A. bring B. take C. buying D. sucking 12.The company has ________ its operations in China by building a new factory there. A. conducted B. expanded C. enabled D. enhanced 13.I haven’t really kept ____________ people I knew at school. A. sift through B. responsible for C. look up D. in touch with 14.One evening, when there were no staff to ________ him, he walked out of the hospital. A. superior B. super C. supervise D. supermarket 15.The government has __________ a new plan to build more houses. A. design B. work out C. encouraged D. launched