We ve _______ our old gas heating system to a more eco-friendly electric one.
About this question
This question belongs to "Trắc nghiệm tổng hợp Phrasal Verbs - Đề số 2" on Học Mỗi Ngày. Review the answer, solution, and related items in the same set to study more effectively.
Question detail
We've _______ our old gas heating system to a more eco-friendly electric one.
A
changed over
B
changed into
C
changed down
D
changed up
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