Đề thi giữa kì 2 Tiếng Anh 11 có đáp án (Đề 4)

The production of tin ore in the United States is relatively insignificant less than one hundred tons annually

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The production of tin ore in the United States is relatively insignificant, ____ less than one hundred tons annually.

amount to

in the amount

amount to it

to the amount of

Giải thích

Đáp án: D