用括号内所给单词的适当形式填空。

1．Reading aloud to practice _________ （ pronounce ）is a good way．

2．I used to be afraid of _________ （ fly ）in an airplane．

3．My _________ （ big ）problem is that I’m not interested in math．

4．He thinks this a ________ （ success ）meeting．

5．If you speak English so ________ （ quick ), we can’t follow you．