31. Many businesses started up by college students have ______ thanks to the comfortable climate for business creation.

46.The ______ of bacteria causes body odor.

23. If we ______ adequate preparations, the conference wouldn’t have been so successful. 

（ ）52. Bella enjoys eating out but can’t afford to spend very much at the moment as she is saving for a holiday. She has never learnt how to cook, so now might be quite a good time to find out!

22. Not until the motorbike looked almost new ______ repairing and cleaning it.

26. Being unique should be encouraged because that’s ______ makes our society a society. 

17. He was very busy yesterday; otherwise, he _____ to the meeting.

48. Any worn clothing or ______ will produce bacteria used bath towel

66. China will develop its economy further and open itself wider to the outside world, which offers more business opportunities to overseas enterprises. Since China‘s reform and opening up, Chinese enterprises have been cooperating with overseas enterprises in terms of the economy and technology, and have scored great achievement. Overseas enterprises have not only helped Chinese enterprises with their growth, but also benefited from the cooperation. The Chinese government will continue to offer favorable policies and conditions to promote the further cooperation between Chinese and overseas enterprises.

44. What can we learn from the passage?

（ ）51.Although Rob lead a quiet life in a small village, that doesn’t stop him from wanting to find out about the latest scientific development.

37. The underlined sentence “Their judgements were no better than chance” implies that the testees ______.