用适当的介词或副词填空1.I practise the roll play___working____a group2.

用适当的介词或副词填空
1.I practise the roll play___working____a group
2.Tim is doing a survey____learning English
3.When I was studying in middle school,I often made mistakes____grammar.
4.Math wasn't very easy____us
5.To begin___,he could say nothing and his face turned red,because he was afraid that his classmates might laugh___him.
6.We should just listen___the most important messages,not everything.
7.--What isn't easy____learning English
---Making____conversations