48. Either the boy or his twin sister must have eaten dir nner nere B)their C)ours 49. For some psychologists and educators, in fact, language and thought are considered identical language thought because one cannot be observed without another B)others C)one another D)the other 50.He is of musicial A)anybody B)anyone C)somebody D)something 51. I don't think we have before. You are confusing me with A)other person B)someone else C)one another D)some other 52 Solid-fuel engines are simpler than liquid-fuel engines have important uses A)both of them B)both however C)so both D)but both 53. Scarcely enemy planes were left undamaged after the guerrillas attack B)any C)other D)all 54. The clothes were heavy, but the suitcase didnt weigh much A)itself B)themselves C)himself D)oneself 55. We must do duty, as we must do we have kept promises let them kee A)theirs, our, ours, their B)theirs, ours, our, their C)their, ours, our, theirs D)their, our, ours, their 56. one element may be substituted for in a compound, the substituted element being set free Aone other B)other )another D)the other 57 thought his was a good thing A)Not everybody B)Only somebody C)Not anybody D)Just somebody 58. The current economic crisis caught by surprise A)almost everyone B)most anyone C)the most everyone D)each one and everyone 59. Our whole class went out for a picnic yesterday,so what happened on the campus48.Either the boy or his twin sister must have eaten dinner here . A)his B)their C)ours D)her 49.For some psychologists and educators , in fact , language and thought are considered identical ; language thought because one cannot be observed without . A)another B)others C)one another D)the other 50.He is of musician. A)anybody B)anyone C)somebody D)something 51.I don’t think we have before . You are confusing me with . A)other person B)someone else C)one another D)some other 52.Solid-fuel engines are simpler than liquid-fuel engines , have important uses. A)both of them B)both however C)so both D)but both 53.Scarcely enemy planes were left undamaged after the guerrilla’s attack. A)some B)any C)other D)all 54.The clothes were heavy , but the suitcase didn’t weigh much . A)itself B)themselves C)himself D)oneself 55.We must do duty , as we must do , we have kept promises ; let them keep . A)theirs , our , ours , their B)theirs , ours , our , their C)their , ours , our , theirs D)their , our , ours , their 56.One element may be substituted for in a compound , the substituted element being set free . A)one other B)other C)another D)the other 57. thought his was a good thing. A)Not everybody B)Only somebody C)Not anybody D)Just somebody 58.The current economic crisis caught by surprise. A)almost everyone B)most anyone C)the most everyone D)each one and everyone 59.Our whole class went out for a picnic yesterday , so what happened on the campus