1.A
leave a message to sb 留下一个口信给某人
leave a message for sb 替/帮某人留一个口信
2.A
shall/shan't用在第二/三人称为主语的陈述句时,表示说话人警告/许诺/命令/威胁等语气.
此题表示一种警告.
3.B
but why = but why have you come around?
所以当然用不定式短语来回答这个why的问题,且To see that all is right = I've come round to see that all is right.
see后面是一个以that引导的宾语从句,that当然是连词了.
4.形容词后面加of当然可以,而且很多哦,再如：
be afraid /sure/aware of.
5.west为副词,在句中做表语.
且：It is west of Samon.
= It is in/on/to the west of Samon.
其中第一句的west为副词,第二句中的west为名词.