68. ______ under water, the steel block will be found lighter.

　 A. When you place　 B. When placed　 C. When to place　 D. When placing

67. They are going to make _______ to have a meeting on Tuesday afternoon.

　 A. a rule　　　 B. it rule　　　 C. it a rule　　　 D. that a rule

66. I like ______ in the autumn when the weather is clear and bright.

　 A. this　　 B. that　　　 C. it　　　 D. one

65. I hate ______ when people talk with their mouths full.

　 A. it　　 B. that　　 C. these　　 D. them

64. I had no trouble ___________ your house last night.

　 A. find　　 B. to find　　 C. finding　　 D. to finding

63. The house had been out of condition for years, so they decided to ________.

　 A. get it rebuilt　　 B. get it to rebuilt　　 C. have it be rebuilt　　 D. have rebuilt it

62. The ______ you offered for this travel are reasonable.

　 A. advice　　 B. suggestion　　 C. advise　　　 D. tips

61. Their working conditions _______ the same _______before.

　 A. stayed; as　　 B. stayed; like　　　 C. were stayed; as　　　 D. were stayed; like

60. The students left the classroom _______ all the lights on.

　 A. with　　　 B. and　　　 C. but　　　 D. when

59. It’s time I ______ my hair cut. It’s the fifth time that I ______ to the barber’s shop.

　 A. had; have gone　　 b. have; have gone　　 c. have; went　　 D. had; go