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Choose the best option for (30):

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This question belongs to "Đề Thi Thử Tốt Nghiệp Tiếng Anh 2026 Sở GD Cà Mau Lần 1" on Học Mỗi Ngày. Review the answer, solution, and related items in the same set to study more effectively.

Question detail

Choose the best option for (30):

A

both of them are needed to produce batteries

B

these are needed for producing batteries

C

which is the needs in the production of batteries

D

both of which are needed for battery production

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