现在有一根150cm长的铁丝，用这根铁丝焊成一个正方体的框架，还剩铁丝6cm，周围用纸板封好．至少需要多少平方厘米的纸板？

用所给单词的适当形式填空。

1.These        (be) my Chinese books.

2.Lily and Lucy          (be) her cousins.

3.Thanks for          (answer) my question.

4.Are these the         (photo) of Linda's family?

5.-What are these in English?

  -They're         (watch).

6.Here        (be ) a card for you.

7.They're good          (boy) .

8.Thank you for your story books.         (it) are interesting.

9.I have many     (friend) here.

10.That's      (he) son.