You’d better complete the task within a dayOur boss will come to have a check tomorrow.—Are you kidding? That’s _______Only God can do it.[ ]

The students are talking about ______ holiday plans happily.

In many countries, some scientistsare already _______ research in order to produce a cloned human baby.

Too noisy outside! I just can’t focus on my study.—______. Let’s go outside and play soccer instead.

News came from the company _____my brother was fired due to his bad performance. [ ]