外研版英语（刘兆义主编）三年级上册 Unit 1 Hello！课时练习一、单选题1.What ______ this?（ ） A. is B. are C. am2.My new ___________.（ ） A. is B. skateboard C. Hello3.This is _____ egg. （ ） A. is B. my C. apple4.- Goodbye! （ ）- __________. A. Hello! B. Look! C. Bye-bye!5.-What's you...
