Where did you see your friend—It was in the super market ____ I was doing shopping.

Thank you for helping me with the heavy desk.—- ______________.

old workers made a very practicalsuggestion at the meeting, but it was _____ by the manager

填入下面一段文字横线处填入语句，最恰当的一句是（ ）种群中较弱个体的存在，可能有助于加强种群的长期稳定性，从而减少灭绝的险。 ，结果发现，鱼群中混有多种不同的性状，会对种群产生积极的影响。那些在近海珊瑚礁区发育的幼鱼更可能返回成年时的栖息地；那些在潮池区发育的幼鱼可能成为繁殖的“赢家”，但它们通过增加数量和减少波动，为种群的稳定性做出了贡献。

Open the window please, Mike.— I can’t hear you.