II. Chọn đáp án đúng có đáp án (Part 2)

_______ effort has gone into making the software reliable. A. Many B. A great many C. A wide range of D. A great deal of

54/500

_______ effort has gone into making the software reliable.

Many

A great many

A wide range of

A great deal of

Giải thích

Chọn D