用括号内所给词的适当形式填空，使句意完整

小题1:I’m going to be a______ (report) when 1 grow up. I like meeting different people every day,

小题2:China has become much______ (strong) than before. We’ re all proud of her.

小题3:Look! The children are playing  ______ (happy) in the park.

小题4:Of all the vegetables, I like______(tomato) best.

小题5:Stop______ ( talk), please,Let’ s begin our meeting.

关于终致癌物，下列叙述错误的是

A．前致癌物经代谢转化，最后生成的活性代谢产物为终致癌物

B．前致癌物经代谢转化生成的代谢产物叫终致癌物

C．细胞色素P450依赖性加单氧酶是最重要的代谢活化酶

D．终致癌物大多是亲电子剂

E．终致癌物具有直接与DNA反应的活性