Swimming is ______cycling. So I like cycling better. I want to have fun and I want to be safe as well.

Would you like to go there with me — Yes, I shall go unless I ______ too busy.

Neither the students nor their teacher _______ the solution to the problem.

The sign “NoSmoking” can be seen ____.

Is it for two months ______ they have stayed here?-No,it is only three weeks ______they arrived here．[ ]