Rain is pouring down from the sky without any sign of stopping．Farmers begin to worry about their crops since it _____ as long as 24 hours

I shall never forget the day __________ Shen Zhou V was launched, ______________ has a great effect on my life.

The organizers promise ________wins the first prize a chance to go abroad。

It is the place _____ I once visited when I was young.

It’s not necessary to explain the truth________ there are air, water and sunlight , there are living things.