(单选题) 23: Chemicals are released into the air. As a result, the atmosphere becomes thicker and ___ more of the Sun's heat.
A: retains
B: restrains
C: remains
D: regains
(责任编辑:admin) |
(单选题) 23: Chemicals are released into the air. As a result, the atmosphere becomes thicker and ___ more of the Sun's heat.
A: retains
B: restrains
C: remains
D: regains
(责任编辑:admin) |