A)用be动词的适当形式填空。
1.My parents _________ workers.
2.“U”_________a letter,but“You”_________a word.
3._________there any children in the park?
4.There _________a pen and three knives in the box.
1.My parents _________ workers.
2.“U”_________a letter,but“You”_________a word.
3._________there any children in the park?
4.There _________a pen and three knives in the box.