NEW SOURCES OF ENERGY ARE CONSTANTLY BEING LOOKED FOR _______.A. AL...

1. - DE THI THU DH DO LUONG
Tiếng Anh DE THI THU DH DO LUONG

1. New sources of energy are constantly being looked for _______.

A. although fossil fuels continue to dwindle

B. fossil fuels continuing to dwindle

C. so that we continue to reduce fossil fuels

D. as fossil fuels continue to dwindle