It is difficult for any of us to eat better, exercise more and sleep enough _________ we know we should.
Nowhere else in our world ________ such a quiet, beautiful place ________ Angkor Wat.
– What a hard chair! --Yes, it is. But in fact, it is very comfortable to _____.
–Do you think we are going the right way to the Forbidden City? —Sorry, I’m not sure.But it _______ be.
---What ‘s the matter with you? --- You _____ my heart. - -- But I didn’t mean to hurt you.
Some adverts, like the environmental protection advertisement, _____ to our conscience or our desire to be worthy citizens.