試題詳解

3. Biochemists use fireflies to study bioluminescence, _______.
(A) the heatless light given off by certain plants and animals
(B) certain plants and animals give off the heatless light
(C) which certain plants and animals give off the heatless light
(D) is the heatless light given off by certain plants and animals
(E) of which is given off the heatless light by certain plants and animals