在下面一段话的空缺处依次填入词语，最恰当的一项是（1）近日，在接到朝阳区群众举报后，公安民警连夜对区内的某酒店进行了秘密________，终于在该酒店客房内抓获涉毒吸毒人员宋某，缴获毒品大麻若干。 （2）比起秋天的枫林来，夏天的枫林没有那么撩人的红韵，但那生机盎然的绿，________着的却是一股青春的朝气。（3）刚一入夏，蚂蚁就开始为遥远的冬天储备食物，以便在万物凋敝的冬季，同样可以丰衣足食。________，这就是蚂蚁的智慧。

You can get the best result ______you carry out the experiment under the desired conditions

Do you think we can get there on time -Yes，_______ the truck doesn’t break down.

Mum, my little sister is crying all the time. —Mary, be !She feels sick. You should take good care of her.

It rained cats and dogs this morning.I’m glad we took an umbrella.—Yeah，we would have got wet all over if we ________.