2012年12月大学英语六级语法专项练习(3)

　51. Professor smith and Professor Brown will ________ in giving the class lectures.
A) alter     B) change     C) alternate      D) differ（C）
52. Understanding the cultural habits of another nation, especially ________ containing as many different subcultures as the United States, is a complex task.
A) one     B) the one    C) that     D) such（A）
53. The manager promised to have my complaint ________.考试用书
A) looked through   B) looked into   C) looked over    D) looked after（B）
54. You can’t be ________ careful in making the decision as it was such a critical case.
A) very   B) quite       C) too       D) so（C）
55. Children are ________ to have some accidents as they grow up.
A) obvious     B) indispensable     C) bound     D) doubtless（C）

答案：51. C 52. A 53. B 54. C 55. C