The head teacher said we had only three days to finish the project.—Don’t worry. We have already ________ two thirds of it.

下列各句中，没有语病的一句是（ ）

Where did you find your wallet? —–It was in the park _______ we went for a walk yesterday.

What do you think of a good friend—Friends are like books—you don’t need a lot of them _________ they’re good.

____exciting our life will be in the future with so many wonderful invention!