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put 15. giving 16. have。 young[ 四、單句改錯。 young C. you nger。 saw 23. _______ does it take you to go by bus from Tianjin to Beijing? About five hours. A. How long B. How often C. How many times D. When 24. Not only Tom but also Jack ______ to that city several times. A. have been B. has b een C. have gone D. has gone 25. The Greens _______ Tianjin since 2020. A. have been in B. have been to C. have gone in D. have gone in 26. Everyone knows that China is famous ______ the Great Wall in the world. A. of B. for C. with D. on 27. The girl was born _______ the morning of May 1, 1991. A. on B. in C. at D. of 28. Do you know the _____