A:CO
B:CO2
C:Cl2O
D:CH4
读图,回答下列问题。
2460=____+____+____
4506=____+____+____+____
6003=____+____
One day Eddie and Hobo looked at the ____. Eddie thought he saw a____but Hobo thought it was a ____. Because Hobo saw one ____. Eddie thought there were many bright ____and it was too____, so it couldn't be a plane.