say you have not done but I do hope to do describe a time that you are trying to do something that you have never do

Are you prefer to do some works or projects in one time and do each work or project at one time. you choose to do many things for some time, or period of time to do one thing.

3, to open a school requirements for students to do 2 weeks workshop. Boys do not agree with this requirements, because 1. Can help some people, but can not help everyone. He has had a similar work, no time to do workshop, duplication of effort, does not make sense; 2. This work should be similar to the choice of students, not requirements, some students have a summer plan, it will conflict

4, the animal sounds V sounds, some of us can not hear. However, useful animals. 1 can issue a warning, such as predator coming, young birds this sound to the mother, mother to come back protected chicks. 2 can be used as the exchange of information to find food. In particular, a bird eating leaves, a place to eat, everyone everywhere, a bird found, to inform you

5, natural club to go hiking, then there is no transpotation, because there are 16 people up, the car seat no less than two proposals, one is divided into two groups, running back and forth, this will waste time. The other is rent a van, but very expensive, people will complain.