A.volume B.noise C.voice D.pitch
A.guide B.control C.keep independence from
A.小学一年级 B.小学二年级 C.小学三年级 D.初中一年级
A.we should stick to them until we complete them B.we may change our goals as we have new ideas and opportunities C.we had better wait for the exciting news of success D.we have made great decision