Experiments of this kind ______in both the U. S. and Europe well before the Second World War.
| A．have conducted |
| B．have been conducted |
| C．had conducted |
| D．had been conducted |
. It is said that Mr. President will hold a dinner party _____ the heroes who have won honor for the country.
| A．to praise for | B．in honour of | C．instead of | D．to celebrate |
The gardener was called to tell the way ____ the poor dog had died.
| A．that | B．which | C．in that | D．of which |
This is Mr. Smith, ____ has something important to tell you.
A. who I think B. I think who C. he thinks D I think he
I _____ the boy to save money for the future, but he wouldn’t listen.
| A．hoped | B．suggested | C．made | D．advised |
In modern civilization, mankind is destroying the planet, all __________ progress.
| A．as a result of | B．in the name of | C．in a state of | D．by the side of |