单句语法填空
1．The local government has taken some effective measures, ___________ (aim) at cutting down the cost during the tough economy.
答案：aimed/aiming
2．The present situation is very complex, so I think it will take me some time to figure___________ its reality.
答案：out
3．I’m writing a letter, expecting your newspaper to appeal to the public ___________ (pay) more attention to environmental protection.
答案：to pay
4．The boys made an attempt ___________ (leave) for camping but were stopped by their parents.
答案：to leave
