If it _______tomorrow, I will go on a picnic.

I’m not sure whether this is the room ________ she left her dictionary. 

You can shut your eyes to the fact_______he did was right.

__ has been mentioned above, continued chairman after he took a sip of coffee, ____ the project must be carried out before spring flood comes.

_________ difficult the task may be, we must finish it on time, because we can’t meet such a precious opportunity _______ we have expected.