[問題]考古37-Q15

[oneseven]

Biologists believe that they have found one of the substances that tell individual genes both when to become active and when to remain quiescent in the earliest phases of an embryo's development.

A. tell individual genes both when to become active and when to remain
B. tell individual genes both at which time they should become active or should remain
C. tells individual genes both when to become active or remain
D. tells individual genes both when to become active or when to remain
E. will tell an individual gene both about when it should become active and remain

Answer : A

但是我覺得是D耶
tells 修飾的主詞是one
both when... and when...平衡的漂亮
請教大家

[小花]

我覺得 that 子句是修飾substances
so 用tell沒錯

D) both ...or ..標準的錯誤長相