人教版（2019）必修 第一册Welcome Unit 基础练习（含答案）.docx
人教版（2019）必修一 Welcome Unit 基础练习
一、单选题
1．Tom is the boy ________is good at English.
A．which B．who C．whom D．/
2．The little boy was in danger. The doctors and nurses are doing everything________ they can ________ him.
A．which; help B．what ;to help C．that; to help D．how; help
3．Is oxygen the only gas ___...