— You may find the key to the maths problem on page 107.
— Ah, it’s so simple. I wonder why I of that.
A. hadn’t thought B. haven’t thought
C. didn’t think D. wasn’t thinking
— You may find the key to the maths problem on page 107.
— Ah, it’s so simple. I wonder why I of that.
A. hadn’t thought B. haven’t thought
C. didn’t think D. wasn’t thinking
C