5000 câu trắc nghiệm Tiếng Anh 9 có đáp án - Phần 25
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If energy_____ inexpensive and unlimited, many things in the world would be different.

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If energy_____ inexpensive and unlimited, many things in the world would be different.

is

will be

were

would be

Giải thích

Chọn đáp án C