题目内容：

用方框中所给的单词的适当形式填空，每词限用一次.

nice    six      hear   have   safe

1.The winners are looking forward to ______________ from their friends soon

2.Cindy __________geography at 10:00 on Monday.

3.Everyone should learn to treat others ______________.

4.We were all worried about her ____________ during her journey to Africa.

5.The abacus was invented in the __________ century by the Chinese