Question

it is funny that his success came()he least wanted ita.until b.while c.when d.since 2.we are wat...

it is funny that his success came()he least wanted ita.until b.while c.when d.since 2.we are watching tv ()we caught sight of a friend of ours.a.as soon as b while c when d once

Answer 1

1C 原文意为：可笑的是 他的成功--他最不希望的时候到来了 显然中间应该填一个连词 在 则when
2C 原文意为：我们在看电视的时候（突然）看到一个朋友 前半句为进行时 在这里有表示突然的含义 故选择when 表示突然

Answer 2

1.c
2.c 主句为持续动作，从句为短暂性动作时选when，而不用while

Answer 3

1.c 2.c

Answer 4

C C