43.The speaker gave us a b__________ introduction to DNA.

42. The party was well o_______________.

41. Do you know the exact a_________ of money he spent on his holiday?

40. The government should take m_____________ to control pollution.

39. We had nothing in c_______________.

38. Karl Marks d______________ himself to his revolutionary work.

37. Before use, the b______________ should be charged.

36. His laziness l__________ to his failure.

35. More and more animals are d____________ out.

34. You can buy whatever you like in the d_______________ store (百货公司).