一、用所给单词的适当形式完成下列句子
1．After the grand ________ ceremony of the amusement park, thousands of children rushed in to enjoy themselves.It will stay ________ until midnight.(open)
2．His words were so ________ that many people still had a deep ________ today.(impress)
3．The ________on my shoulder reminded me that I was not in the position of saying anything.(press)
4．I'm ________ about the date for the departure, so I can't tell you with ________．(certain)
5．The ________man would never be satisfied with what he had.(greed)
答案: 1．opening；open 2.impressive；impression
3．pressure 4.uncertain；certainty 5.greedy
