. To __ terrorism, what action should be taken?
| A．end up with | B．put an end to | C．close down | D．get close to |
A new technique ____ out, the yields (收成) increased by 20% .
| A．having working | B．having been working |
| C．has worked | D．had been worked |
To our surprise, the painting considered______ should have won the prize.
| A．being copied | B．having been copied |
| C．to have copied | D．to have been copied |
A great many means ______ to fight the forest fire in Russia even Russian Prime Minister Putin took part in the fight personally.
| A．have been tried | B．has been tried | C．has tried | D．have tried |
One’s awareness, both conscious and unconscious, of what happened in the past has a strong on one’s behavior.
| A．pressure | B．role | C．influence | D．power |
Nowadays there are still a number of students school at various grades due to a lack of money in some poorer areas.
| A．leaving out | B．making out | C．letting out | D．dropping out |