Although we hadn’t met for twenty years I recognized him ___ I saw him.
A. the moment B. one moment 
by the moment D. for the moment
— Ben is now in charge of the project.
— ? The project has nothing to do with our business.
| A．How come | B．So what |
| C．Why not | D．What for |
The Greens stayed in Beijing for a week, during ______ time they visited places of interest here guided by me.
| A．which | B．whose | C．that | D．when |
I like this house with a beautiful garden in front, but I don’t have enough money to buy ___.
| A．one | B．it | C．this | D．that |
Though ______ after a day’s hard work, he still told his children stories until they fell asleep.
| A．tire | B．to be tired |
| C．tired | D．tiring |
I ______ in Tibet for three years; if you go there for your holiday this summer, I’ll have my friends take care of you.
| A．worked | B．had worked |
| C．work | D．was working |