词汇运用
A: 用方框中所给单词的适当形式填空，每词仅用一次。

polite    Africa    dead     allow    help

His father’s _________ made him very sad.
“Sorry, but I can’t come to your party,” Frank refused____________.
Sometimes it is _________to make a list of everything you have to do.
Last month, Premier(总理) Li Keqiang visited several __________countries.   .
Nobody could take away the books from the library without being________.