Many of the crimes have gone_________,because some people dare not report them to the police[ ]

He was busy preparing his lessons, only _________ occasionally to have some tea.[ ]

下列各句中，没有语病的一句是（3分）（ ）

Radcliffe, starring Harry Potter, has entered _____Guinness World Records book as one of ______ highest earning actors of the decade．

A bright idea suddenly struck me _____ I could use the money I saved to help a poor student in the countryside.