根据句意和首字母提示，写出单词

1. Last night he went home a__________.

2. Look! Mary is carrying a basket f__________ of flowers.

3. I had great d__________ doing the work.

4. That nurse is very p__________ with little children.

5. She left a m__________ ago.

基因工程的正确操作步骤是

①构建基因表达载体 ②将目的基因导入受体细胞 ③检测目的基因的表达是否符合特定性状要求 ④获取目的基因 [ ]

A．③②④①

B．②④①③

C．③④①②

D．④①②③