Ⅰ.根据句意及首字母提示补全单词
1．After a long term, all the students long for a v________ to relax themselves.
2．The animal is very t________ and we can't see it with eyes.
3．It's 7：00 p．m. now. My parents are sitting on the s________ to watch CCTV news.
4．Lisa rang the d________ and waited for someone to open the door.
5．My cousin likes dogs because they are l________ and helpful to us.
