Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
The production of tin ore in the United States is relatively insignificant, ____ less than one hundred tons annually.
A.amount to
B.in the amount
C.amount to it
D.to the amount of
The production of tin ore in the United States is relatively insignificant, ____ less than one hundred tons annually.
A.amount to
B.in the amount
C.amount to it
D.to the amount of
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Hóa Học lớp 12
