He felt very happy, because he ______ the exam.
A:failed
B:succeeded
C:succeeded in
D:pass
——Excuse me. Do you have a table for ten?——I'm sorry, ______we have a table for eight.
下列一些物质的自我介绍,其中介绍自己化学性质的是( )
下列有关碳循环的说法错误的是( )