It’s time that you __________ the whole book.

I spend about two hours __________ my homework at home every day.

Look at this model ship. I made it all by ______ last week. —– Wow, you are so smart!

23. Each member country of WTO must ______ its laws and regulations and compete on the principle of fairness and co-operation.

下列各句中，加横线词语运用正确的一句是（ ）