There’re so many kinds of tape-recorders on sale that I can’t make up my mind _____ to buy.
It was _____that we went camping on the mountain.
We don’t allow ___in the office. But you are allowed ____in the rest room.
I was about to go out ________ it began to rain.
________ what the teacher said if you think it is important.
She put the sugar and butter into a bowl and ________ them up.