Had he not come an hour earlier, he＿＿＿the secret that his mother was always there.
| A．must never find | B．must never have found |
| C．would never find | D．would never have found |
_______with his old one, Michael’s new house is like a huge palace
| A．Comparing | B．Compares | C．To compare | D．Compared |
He works in China now, But he ______in Africa for eight years .
| A．worked | B．has worked |
| C．had worked | D．has been working |
--Beijing Airport , please. I"ll be there then by ten.
---_______________, but I"ll do my best
| A．No problem | B．All right | C．I can’t promise | D．It’s impossible |
Mary is the only one of the teachers who_____a little Chinese because she is one of my friends who____been to China
| A．knows have | B．knows have | C．know to | D．know has |
________in thought, he almost ran into a passing truck
| A．Losing | B．Having lost | C．Lost | D．To lost |