It's safe to say that ___ British people always talk about ___ weather when they meet.

B,英国人民应该表示为British people或是the British.
the weather特指天气。

D

B. /...the

c

It's safe to say that ___ British people always talk about ___ weather when they meet.
选B,British people或the British,指英国人。
特指天气用 the weather。

选B...It's safe to say that ___ British people always talk about _the__ weather when they meet.
通常英国人见面时总是谈论天气。

British people = The British 都表示英国人的意思..
weather前加the是因为后面的when they meet是个具体的语境.是当他们见面时的天气.所以应该加定冠词the.