84．____

84．Diamond is a kind of____(贵重) stone that is used to make jewelry.

83．____

83． Robots(机器人) are able to understand____(口头)languages.

82．I trust him____(完全). So would anyone who knew him.　 82．_____

81．He came in for supper in a hurry,　 not having____(刷) the dust from his coat. 　　 81．____

80．The word“meet” is____(读作) [mi：t].　　　　　　 80．____

79．We sat by the fire and______(聊天)all evening.　　　　　 79．____

78．The naughty boy was wearing a pair of dirty____(裤子).　 78．____

77．Edison started a newspaper of his own,　 using the little____(印刷)machine he had bought. 　 77．______