Answer:
BAB
Analysis:
1. Zhì zuò yī fu shì hěn fù zá de yí jiàn shì.
1. 制 作 衣 服 是 很 复 杂 的 一 件 事。
Making clothes is a complicated business.
“Zhì zuò (制作)” is a set phrase in the sentence. “zhì zuò (制作)” and “zuò (做)” mean the same in Chinese: make.
2. Zuò yī fu shì hěn fù zá de yí jiàn shì.
2. 做 衣 服 是 很 复 杂 的 一 件 事。
Making clothes is a complicated business.
“Zuò (做)” means “make” in the sentence.
3. Jīn tiān méi yǒu zhōnɡ wén zuò yè.
3. 今 天 没 有 中 文 作 业。
Today I don’t have Chinese homework to do.
“Zuò yè (作业)” is a set phrase, which means “homework”. So “zuò (作)” is the right answer.