Do remember to be ________. We must avoid any possible risks when doing this dangerous chemical

experiment-burns, poisonous gases or cuts from broken tubes.[ ]

A．cautious  

B．thoughtful

C．considerate  

D．curious

（）形象的寓意是心猿，它是七情六欲的主人公。

A、孙悟空

B、猪八戒

C、沙和尚

D、白龙马