Solar units on the (2) _______ of buildings collect the energy and use it to heat water.

Tìm từ có phần gạch chân phát âm khác với những từ còn lại.

If her condition should improve, we’ll inform you immediately.

=> Should ________________________________________________.

Canada is rich in _________ such as zinc, nickel, lead and gold.

________ his physical disability, he managed to finish the course with good results.