The number of books in the bookshop is about 10,000 and a number ofthem ________ about science.is B.was C.are D.Were
The twins has studied in this school ________.
------When and where ____you _____the bag? ------ Oh, yesterday in my desk.
------Where is your father? ------He _______ Shanghai. He has ______ there for a week.
This CD-ROM can help you learn and have fun_____.
Look! What a clean room! Who _______it ?