Experiments of this kind ___in both the U．S and Europe well before the Second World War
| A．had conducted | B．have conducted |
| C．have been conducted | D． had been conducted |
—Hi，Mum.I got promoted for my wonderful performance in my work.
—________
| A．Congratulations！ | B．Best wishes. |
| C．Good luck. | D．Don’t mention it. |
You will________your chances of getting a pay rise if you don’t work harder than others.
| A．injure | B．wound |
| C．harm | D．ruin |
—Why do you look so worried?
—My computer broke down last week and my essay has been left________since.
| A．finished | B．prepared |
| C．done | D．unfinished |
Some parents are just too protective.They want to________their kids from every kind of danger，real or imagined.
| A．spot | B．dismiss |
| C．shelter | D．distinguish |
He had lost his temper and his health in the war and never found________of them again.
| A．neither | B．either |
| C．each | D．all |