Hãy điền đúng từ loại của từ trong ngoặc 31. We should hire such an ___ (experience) man. He is really suitable for our team. 32. It is said that electricity is the greatest ___ (invent). 33. Everyone liked the book, and the critics said that it was definitely a ___ (succeed). 34. Despite their terrifying appearance, most dinosaurs were ___ (harm) vegetarians. 35. Entering the burning house to save the little boy was a very ___ (courage) thing to do. 36. The eyewitness gave a ___ (describe) of the bank robber. 37. Students are under ___ (consider) stress when studying for exams. 38. There was a ___ (understand) and as a result, we failed to meet last night. 39. According to recent ___ (science) research, a glass of milk a day is good for you. 40. The conditions are ___ (accept). I won't sign the contract.