85. 没有免费的午餐。

　 There is ___________ ___________ thing as a free lunch.

84. 总统随后讲话并解答了记者的提问。

　 The President then took __________ ___________ and answered the journalists’ questions.

83. 他们坐在草地上，有说有笑。

　 They were sitting on the grass, ___________ and ___________.

82. 如果你继续以这种方式行事，最终会像老话说的那样：搬起石头砸自己的脚。

　 If you continue like this, you will ___________ ___________ lifting a stone only to have it drop on you own foot, as the old saying goes.

81. 我想解决这问题的关键是兴趣而不是强迫。

　 In my opinion, the key ___________ ___________ the problem is to be interested rather than to force yourself.

80. Speech and writing are man’s most important methods of c____________.

79. The lack of rain could s__________ disaster for farmers.

78. D___________ to his research, he always forgets to have dinner.