单项选择题John can mow a field in 6 hours.Bill can mowa field in 5 hours.Henry can mow a field in 4 hours.Joe can mowa field in 3 hours.Tomcan mowa field in 2 hours.If they all work together at their respective rates, how long will it take to mow the field

单项选择题Why does the article advise people to look at prize-winning books

单项选择题A．To help you lose weight.B．To make you relax.C．To strengthen the stomach muscles.

单项选择题A．The weather was bad.B．There was a traffic jam.C．She crashed her car.

单项选择题A．His pen has leaked in his pocket.B．His pen has not been properly repaired.C．His pen was very expensive.

单项选择题A． To the gymB．To the dentistC．To the barber

单项选择题A．Music.B．A picture.C． Architecture.

单项选择题A．In a library.B．In an office.C．In a shop.

单项选择题A．People who have plenty of money.B． People who might want to borrowmoney.C．People who need to save money.

单项选择题A． Too crowdedB．NoisyC．Boring