Really? 真的? Are you serious? 你是认真的吗? Are you joking? 开玩笑呢吧? I doubt it. 我怀疑。 It sounds fishy to me. 听起来可疑。 I won't buy that story. 我不信他的话。 Do you think she's serious? 你认为她是当真的吗? I don't take him too seriously. 我不把他的话太当真。 I don't believe him. 我不相信他。 It's too good to be true. 有这么好的事!
