填空题
Tom () his baggage on the conveyor belt. 【put】汤姆正在往传送带上放行李。
is putting
填空题 Does he () for Air China? 【work】她在国航工作吗?
填空题 She () English very hard. 【study】她学习英语很刻苦。
单项选择题 He () a very important part in the management of the company.