Đáp án C
Kiến thức về từ vựng
A. spend /spend/ (v): dành, dùng
B. take /teɪk/ (v): mang, lấy
C. cost /kɒst/ (v): có giá, tiêu tốn
D. charge /tʃɑːdʒ/ (v): nạp, tích trữ
Tạm dịch: “For instance, the use of solar panels can potentially save you money on your energy bills, but they can (2) ______________ thousands of dollars to install.”
(Ví dụ, việc sử dụng năng lượng mặt trời có thể tiết kiệm tiền trên mỗi hóa đơn tiền điện của bạn, nhưng chúng có thể tiêu tốn hàng ngàn đô la để lắp đặt.)
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