一株优质梨树，要进行扩大种植，最好采取下列哪一种方式？ [ ]

A．播种

B．压条

C．嫁接

D．扦插

根据所给单词完成句子。

1. He says he ____ (be) tired.

2. He said he ____ (be) sorry.

3. She said she ____ ____ (wait) for her mother.

4. The teacher told us that the earth ____ (move) around the sun.