Question21: Lan should install this more beautiful. A. hardware Question 22: If you have an B. software on her smartphone. It helps to make her photos C. device D. equipment you don't have to bring all those heavy books in your C. digital camera problem. The computer screen is broken. C. device D. earbuds D. equipment bag. A. correction pen B. e-book reader Question 23: I think this is a A. hardware B. software Question 24: Washing machine or vacuum cleaner can help you to A. kill B. save Question 25: A robot vacuum cleaner is a C. spend time while doing housework. D. waste device in your home. It makes housework less tiring. A. help B. helpless C. helpful D. helpfully
