All the         indicate that he has been deeply involved in the crime.

It will take a lot of time and_____ to finish the task on time. 

No one has yet discovered who is responsible for the incident but the police are already collecting ______．

--Mum, I’m going to visit my uncle. What about staying there a week?--A week is too long. Try to be back in a _____ of days.

I know that our geologists think highly of his researches in the ______