1 . Everyone should be________(提醒) of the importance of safety awareness when conducting experiments in the chemistry lab. （根据汉语提示单词拼写）

2 . The house _______(建立) on a rock. (根据汉语提示完成句子)

3 . Mark Twain was b______ up in Hannibal, Mjssouri, along the Mississippi River. (根据首字母单词拼写)

4 . All the shirts in the shop window were ________ (减少) to $20. （根据汉语提示单词拼写）

5 . In China, more than one city _________ (connect) by the high-speed railway network by far. (所给词的适当形式填空)

7 . The victims were not ________(提到) to by name. （根据汉语提示单词拼写）

8 . It has been ________(证实) that he is leaving for Beijing. （根据汉语提示单词拼写）

9 . All the preparations for the task ________, and we’re ready to start.

A．completed

B．complete

C．had been completed

D．have been done