Nobody knows how he was murdered, but _______ people behind the scenes can guess why.
| A．a great deal of | B．a good many | C．a good amount of | D．a great many of |
Modern equipment and no smoking are two of the things I like ____ working here.
| A．with | B．over | C．at | D．about |
If their marketing plans succeed, they ____ their sales by 20 percent.
| A．will increase | B．have been increasing | C．have increased | D．would be increasing |
Stand over thereyou'll be able to see the oil painting better.
| A． | but | B． | till | C． | and | D． | or |
The director had her assistant ___ some hot dogs for the meeting.
| A．picked up | B．picks up | C．pick up | D．picking up |
If the weather had been better, we could have had a picnic. But it ____ all day.
| A．rained | B．rains | C．has rained | D．is raining |