(there are) no prizes for guessing what… who… etc.
释义
●(there are) no prizes for guessing what…, who…, etc. (informal) (it is) not difficult to guess or find the answer to sth一猜就知;显而易见;不难发现◆No prizes for guessing who does all the work around here.不难发现这一切都是谁干的。