Other genetic similarities suggested they all ________ a single, common ancestor about 300 years ago

eaches us not to regret over yesterday, for it ________ and is beyond our control.

下列各句中，没有语病的一项是（）（3分）

下列各句中，成语使用恰当的一项是……………………………（）

Your car should be ready next Tuesday—We were ________ hoping you’d be able to do it by this Friday