______ you do the experiment carefully, you would make discoveries others wouldn’t make.
| A．Should | B．Would | C．Could | D．Might |
Henry was away from home for quite a bit and _______ saw his family.
| A．frequently | B．seldom | C．always | D．usually |
me tomorrow and I'll let you know the lab result.
| A． | Calling | B． | Call | C． | To call | D． | Having called |
The reports went missing in 2012 and nobodythem since.
| A． | sees | B． | saw | C． | has seen | D． | had seen |
Caroline doesn't have a gift for music，but sheit with hard work.
| A． | goes back on | B． | takes away from | C． | makes up for | D． | catches up with |
Although youfind bargains in London, it's not generally a cheap place to shop.
| A． | should | B． | need | C． | must | D． | can |