Private printing was simply means ______ he could increase his income

Private printing was simply means ______ he could increase his income

Đề bài: Private printing was simply means ______ he could increase his income.

A. whereupon

B. whereby

C. wherewithal

D. whereabouts

Lời giải:

Đáp án: B

Giải thích: whereby = nhờ đó, do đó

Dịch: Mở hàng in ấn chỉ đơn giản là phương tiện nhờ đó anh ta có thể tăng thu nhập của mình