PRACTICE TEST 8- Đại từ nhân xưng, Đại từ sở hữu và Đại từ phản thân
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When they were first introduced, electronic calculators were less powerful and cost many more than they do today.

100/100

When they were first introduced, electronic calculators were less powerful and cost many more than they do today.

When

were

less powerful

many

Giải thích

Chọn đáp án D