1.Please let Mary answer the question

2.They are come from a beautiful country

3.The old man crossed the bridge carefully

4.She works on a farm from day and night

5.We should stop them from cutting down the trees

6.They arrived in Beijing yesterday afternoon

7.They often go to school on foot.

8.The little girl is afraid of mice

9.They both refuse to steal the vase

10.A good detective never hurry to conclude