[文法] 關於一些文法的疑問

[diligence26 (DADA)]

Fobes wants to bring them back to his laboratory where he can isolate

and identify the genes that give them ---- strong characteristics,

so that someday they can be genetically --- into commercial tomatoes .

Fobes is just one of the many scientists who ---searching the wilderness to

find plants with genes........

    第一個空格  so  / such / likely / as
    第二個空格  engineer / engineering /engineered /to engineer
    第三個空格  is /are

我的疑問是請問第一個空格是從語意是來辨別要填的是as嗎
還要第二個空格,是因為被動,所以答案是engineered嗎
最後第三個,主格是scientists,所以動詞要用複數are嗎
以上是我的一些疑問,麻煩有好心的大大可以替我解答一下嗎^^

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推 CashewNuts:第一個空格應該是such吧!
→ saram:such as