It is clever ______ you ______ out the problem.
--Kangkang, has your homework been finished yet?--Yes, mom. I __________ it half an hour ago.
–Kangkang told me he would have a party this evening. Are you going there?--I’m invited, too. But I have a lot of homework to do this evening, and I wonder _____.
When we meet again in twenty years, we will be excited and talk about things and persons _____ we remembered in the school.
--- Would your younger brother go for a picnic this Sunday ?--- If I don’t go , ___________.
--- The light in her room is still on. Do you know ______?--- In order to pass the coming final exam.