Word forms

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----- Nội dung ảnh -----
46. To my ..................., he passed the test so easily (amaze)
47. They are clearing all the ............ off the beach (pollute)
48. The main ............ is the low price (attract)
49. We should preserve our .............. resources here (nature)
50. They will take .............. bicycle rides here (leisure)
51. The circus .............. by Tom was very successful. (perform)
52. Uncle Ho's career is .............. (admire)
53. They have made careful ................. for the demonstration (prepare)
54. He has a good ... of French literature (know)
55. The boy was .............. he lost the match (success)
56. She likes going .............. with her classmates (picnic)
57. Are there any ................. between them? (similar)