gmat改错题（ ),all the buildings were reinforced withadditional steel.A:Being prone to earthquakesB:Since the area was known to be prone to earthquakes为什么不选A?all the buildings是主语有什么问题吗？

gmat改错题（ ),all the buildings were reinforced withadditional steel.A:Being prone to earthquakesB:Since the area was known to be prone to earthquakes为什么不选A?all the buildings是主语有什么问题吗？ you needn't to stay in the room all the time A.to stay B.in C.the D.all 改错题,哪处错误怎么改. Sandy plans to travel all over the China改错题 Tom is my the cleverest friend of all.改错A:is B:my the C:cleverest D:of all all the peoples are very excited.改错All the peoples are very excited.（ ）A B C D 改错 All thing are in the car. All of the two children cry.改错! all the house are in holland改错 The children are all happily(改错） Have all of the children reached改错 一道GMAT句子改错题The direction in which the Earth and the other solid planets - Mercury,Venus,and Mars - spins were determined from collisions with giant celestial bodies in the early history of the Solar System.a.spins were determined from b 【GMAT数】all of the following have the same number of distinct prime factors except:20,21,24,30,45【GMAT数学】all of the following have the same number of distinct prime factors except:(A)20(B)21(C)24(D)30(E)45,答案为什么是D我的理解 一道Gmat句子改错题,The lack of complete historical records from the mid-to-late 1800’s have made some Black inventions difficult to trace to their originators.(A) have made some Black inventions difficult to trace to their originators(B) hav 改错题：Are all of students staying in the classroom now?错在哪里, All the food were on the table.改错! We all know the earth go around the sun.(改错) Among all the students,Li Ming is the best 改错 改错.the children all are in the classroom now