[考題] 請幫我解答

[ionbreak (陳琳)]

這是我碰到不懂的問題 希望可以幫我解答

Formasan flying foxes are the largest bats in Taiwan. They eat fruit and live in trees. For the past 30 years, they could only _______ in zoos. That's because most of them were caught ______ pets or killed for their meat in the 1970s.

第一個空格 (A) see (B) seen (C) were seen (D) be seen
答案是(D)
第二個空格 (A) by (B) as (C) for (D) with
 答案是(B)






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→ Nishizawa:1.純粹考被動 助動詞+原型V 2.as 有當作/作為的意思
→ ionbreak:第一空格的(A)呢？也是原形？
→ jacqueswu:牠們只能在動物園"被"看到~所以不能用A
→ priv:A 會變成在動物園牠才看得見(不在動物園的時候是盲的), 文意
→ priv:不合