A:put out
B:leave out
C:point out
D:pick out
①竞争的结果是优胜劣汰 ②竞争比合作更重要
③要学会正确处理合作与竞争的关系 ④合作中有竞争,竞争中也需要合作
Our English teacher often tells us that success needs a lot of _______.