Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 4)

for (81) ………………….., bottles, can be re-used, but it is expensive or difficult to do this with a lot of plastic products.

72/96

for (81) ………………….., bottles, can be re-used, but it is expensive or difficult to do this with a lot of plastic products.

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Giải thích

for (81) example, bottles, can be re-used, but it is expensive or difficult to do this with a lot of plastic products.