66．equal　67.experience　68.devoted　69.regularly

75．China is doing her best to catch up with ______(先进的) countries, such as America and Japan.

[答案]

74．I have no idea how long the walk ______(实际上) took.

73．We’ve won two gold medals in weight ______(举重)．

72．They invited him to visit their country at a ______(方便) date.

71．As an ______(官方) language, Putonghua is widely used all over China.

70．The film ______(产业) all over the world brings in much money.

69．He visits the city ______(定期) every year.

68．Mr. Smith has ______(献身于) all his energy to his work.

67．She has much ______(经验) in teaching children to swim.