The PLA soldiers came to the ruins of Yushu and after ______ seemed to be a long time, they helped some victims out.
It’s a very kind offer, but I really _____ accept it.
This cake is very sweet. You _________ a lot of sugar in it.
—Catherine, I have cleaned the room for you. —Thanks. You _________it. I could manage it myself.
He paid for a seat, when he _________ have entered free.
—Do you know where David is? I couldn’t find him anywhere. —Well. He _________have gone far—his coat’s still here.