51. It is stamps that I get from some places like Russia and Thailand.
52. The picture at which she was looking was beautiful.
53. I was able to think, you were a good student in our class.
54. It's her mother who gave her son a phone on his birthday.
55. The first person to come to class must clean the board.
56. Three boys are said to have been arrested after the explosion.
57. The books about which I told him are interesting.
58. Neither Tung nor Hoa has got a phone.
59. The flowers at which they are looking are beautiful.
60. Many people are thought to have been died in Covid-19 in 2020 in China.
