Ⅰ.根据首字母或括号内提示，用单词的正确形式填空
1．They're both in their ________(twenty) and both married with children of their own.
2．Mr. Smith was ________(know) as a walking dictionary.
3. Picasso had his first ________(exhibit) at the age of 16.
4．These artists painted with watercolors and inks, using soft ________(brush) .
5. Try to use all your spare time to practise English ________(crazy).
