1 . Though he has never met any aliens, he believes they do __________ (存在) . (根据汉语提示单词拼写)

2 . Many people ________(遭受) from mental illnesses at some point in their lives. (根据汉语提示单词拼写)

3 . The town ________ (威胁) by rising flood waters, so most families fled to higher ground. (根据汉语提示单词拼写)

4 . I really a__________ having time to relax with you on this nice island. (根据首字母单词拼写)

5 . Usually, passengers ______ (被提醒) that no smoking is allowed on this train. (根据汉语提示单词拼写)

6 . The problem is still impossible for us to ________(解决) at present. (根据汉语提示单词拼写)

7 . It is strongly ________ (建议) that the machines should be checked every year. （根据汉语提示单词拼写）

8 . Being exposed to English frequently ______(使可能) us to have a good knowledge of this language. (根据汉语提示单词拼写)

9 . To make sure your appliance is in fact off,________(移走，去掉) the plug from its power supply. (根据汉语提示单词拼写)

10 . Don’t ________ (迟疑，犹豫) to turn to me when you are in trouble.(根据汉语提示单词拼写)