Trắc nghiệm Chuyên đề 5: Writing có đáp án (Phần 2)
Xem toàn bộ quiz

The cost of installation is very high. Solar domestic heating systems are economical to use.

13/231

The cost of installation is very high. Solar domestic heating systems are economical to use.

      ___________________________________________________________________

0/3000 ký tự
Giải thích

The cost of installation is very high, but solar domestic heating systems are economical
to use.