下列过程与植物组织培养技术最相似的是（　　）

A．基因工程

B．抗虫棉培育

C．培育杂交瘤细胞

D．嫁接

句型转换（每空0.5分，共5分）

小题1:He must stay at home to look after his grandpa. (改为同义句)

He must stay at home to _______ _______his grandpa.

小题2:I have over ten story books. Would you like one?(改为同义句)

I have __________ ___________ ten story books. Would you like one?

小题3:Peter was very sad because his brother died in a car accident. (对画线部分提问)

________ ________ Peter very sad?

小题4:It costs 700yuan to visit Mount Tai. (划线部分提问)

________ ________does it cost to visit Mount Tai ?

小题5:Please tell me how I can get to Beijing Hotel. (改为同义句)

Please tell me __________ _________ get to Beijing Hotel.