My parents like the music ____ is quiet and gentle.
The light bulb is really __________ useful invention.
--- I’ll fly to Qingdao for my holiday this weekend. --- Wonderful! ____________
--- What do you think of the book written by Mo Yan? --- Oh, excellent. It is worth ___________ a second time.
Shanghai is bigger than ___________ in Japan.
---________ honest boy you are! --- Thank you!