We’ve been looking at the houses but haven’t found ___ we like yet. A.one B.ones C.it D.them
David had prepared carefully for the chemistry exam, as he wanted to be sure of passing it at the first _____.
---I saw Mr. Smith at Xianyang Airport this morning. ---You ____. He’s still on holiday in Hawaii.
_____ much advice I gave her, she did what she wanted to do.
---- How did you know the surprising news? ---- I happened ____ the event then.
----How about the two of us chatting online? ---- ____ . It’s much cheaper than talking on the phone.