题目

    Years ago, I celebrated my 40th with a large group of friends at a restaurant. As I stood on the sidewalk with my friends, a homeless man approached me and asked for money. I told him that I didn’t have any cash. He quietly smiled (56)_______ me, and moved on.     While (57)______ homeless man was still in earshot range, a friend who was just arriving called out, Happy Birthday, Marc! Upon (58)______ (hear) this, the man turned and asked, Hey man, is it your Birthday? Yes, it is, I said. He walked back to me, with a huge smile on his face, and said, ”Happy Birthday, man!（2011?平谷区一模）把一个标有“220V 700W”的电热杯接在电源上使其正常工作，通电5min，该电热杯产生的热量为2.1×1052.1×105J．