73.Tears of joy ran down her c__________.

72.The famous writer promised to a__________ our opening ceremony, but so far he hasn’t turned up.

　　　　　 根据题中所给的汉字或首字母写出符合句意的单词的正确形式。

71.My father used to be a farmer and he is now a worker in a c__________ company.

35.--- Was it under the tree __________ you were away talking to a friend ?

　 --- Sure. But when I got back there, the bike was gone.

　 A. that　　　　　 B. where　　　　 C. which　　　 D. while