They tried to convince her _______ his innocence

下列各句中，没有语病的一项是（ ）

The students in the international school are encouraged to voice whatever opinions they have andquestion authority, which helps to develop their______ thinking. [ ]

r a picnic this weekend, OK—-_______, I love getting close tonature

Most young girls were scared________stay outside after 10 : 00 p．m.because they were scared________being robbed in the city.[ ]