1) These shoes aren't ____________ for walking in the mountains.  a) practical b) time-consuming 2)  The wheel was a very __________ invention a) useless b) useful 3) My tablet has a very __________ battery. It lasts for hours and hours a) efficient b) inefficient 4) You can't see clearly because it is a __________ image a) high-quality b) low-quality 5) This computer is __________. It often stops working. a) reliable b) unreliable 6) I live a long way from my school, which is very __________. a) incovenient b) convenient 7) If you don't have a fast Internet connection, updating the software is __________. a) time-consuming b) time-saving 8) This toy is made from __________ materials. It isn't going to break easily. a) low-quality b) high-quality

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