A
Black + Decker Handheld Vacuum
This popular vacuum claims strong suction（吸力）and an extended run time of 10 hours be-fore it needs to be recharged. It is complete with a washable bowl. Plus, the dirt bowl is translu-cent（半透明）,so you can always see what' s inside and know when it needs to be emptied. It only needs $ 42.99 (orig. $ 50. 99) now.
Roborock E4 Robot Vacuum
The vacuum (orig. $ 299. 99) is on sale on Amazon thanks to a double discount you can take advantage of right now. Not only is it marked down $ 30 on the site, but you can clip a coupon（优惠券）to save an additional $ 70 at checkout. With a run time of over three hours, it can clean up to 2,152 square feet, and can self-charge if its battery is running low.
Aposen H250 Cordless Vacuum
The vacuum in particular has been praised for its powerful suction and fashionable appear-ance. It has an adjustable tube and a run time of up to 30 minutes after a full charge, and it can even be attached to a handheld vacuum to access those hard-to-reach areas. It only needs $ 146(orig. $178) now.
Shark ION Robot Vacuum AV752
The vacuum claims three brushes that can handle dirt on all types of surfaces, including car-pet and wood. The powerful suction pulls in dirt from corners and edges. Plus, pet waste is no problem: The vacuum sucks up fur of all lengths, thanks to the multi- surface brushroll. Moreo-ver, you can operate it remotely. Wi-Fi-enabling allows the robot to be controlled from anywhere with the SharkClean app. It only needs $150 (orig. $ 220) now.
21. Which vacuum can be bought at double discounts?
A. Black + Decker Handheld Vacuum. B. Roborock E4 Robot Vacuum.
C. Aposen H250 Cordless Vacuum. D. Shark ION Robot Vacuum AV752.
22. Which of the following benefits belongs to Shark ION Robot Vacuum AV752?
①friendly to various surfaces
②good at sucking pet fur
③easy to monitor inside
④convenient to operate on mobile phone
A.①②③ B.②③④ C.①②④ D.①③④
23. Where is the passage most probably taken from?
A. A website. B. A text book. C. A magazine. D. A poster.
