Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble.
Those who have ________ floods and sandstorms know the importance of environmental protection.
You'd better ________ some money for special use.
To ________ it simply, if you don't apologize to him,you will lose this friend.
My suggestion is that you ________ much meat.
When he was there, he ________ go to that coffee shop at the corner after work every day.