在嫁接植物时，一定要注意将接穗和砧木的哪一部分紧贴在一起（　　）

根据材料内容，选择正确答案。

    Mr Smith had a week's holiday, so he said, "I'm going to see the sea by train." He put on his best clothes, took a small bag, went to the railway station and got onto the train. He wore a beautiful hat, and he often put his head out of the window during the trip and looked at the beautiful scenery. But suddenly the wind pulled his hat off.

    Mr Smith took his old bag and threw it out of the window quickly too. The others in the train laughed. "Is your bag going to bring back your beautiful hat?" they asked.

    "N0," Mr Smith answered, "but there is no name or address in my hat, and there's a name and an address on the bag. If someone finds both of them, he or she will send me the bag and the hat.''

填入下面横线的语句，与上下文衔接最恰当的一组是（    ）
我是作家，＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿我说不好。
①笔下从不吝啬大谈感情的字句。     ②对别人从不吝啬大谈感情。
③在亲人面前却很奇怪说不出抒情的话， ④奇怪的是在亲人面前却说不出抒情的话，
⑤习惯是从母亲那儿传来的吧，      ⑥这是从母亲那儿传来的习惯吗？

下列现象中，与城市化进程有必然联系的是（    ）