根据对话内容，选出能填入空白处的最佳句子。
A: Hello, Sam?
B: Maria? Hi！
A: I’m in Mexico!
B: Oh, thanks.
A: So how is it going there?
B: Great!
A: Pretty good.
B: Terrible. It’s cold and raining.
A: Well,
B: I’m having a party. My whole family is here.
A: That sounds like fun. 
A policeman is standing ________ (在……中间) the road directing the traffic.
—Who ________ (带领你们参观) the new lab tomorrow morning?
—Suzy will.
昨天早上，我很开心收到了多年未见的朋友的来信。（hear）
To my great joy, I ____________________ a friend whom I haven’t seen for years yesterday morning.
毫无疑问，冬天是堆雪人的好时节。（snowman）
No doubt it’s a good time to ____________________ in winter.
据说从下学期开始，煮饭会成为小学生的一项必备技能。(say)
____________________ (that) cooking will be a basic skill for pupils from next term.