How many times have you found yourself arriving at school to start your day, only ________ that you left your homework at home?
| A．having discovered | B．discovering | C．to discover | D．discover |
It's usually warm in my hometown in March, but it ___ be rather cold sometimes．
| A．must | B．can | C．should | D．would |
I have _____ all my papers but I still can't find my notes．
| A．looked through | B．looked for | C．looked after | D．looked out |
—Now that you like computers very much, isn't that a good idea to get a ____?
—Well, I'd like to, but I can't afford such an expensive computer at present.
| A．one | B．them | C．it | D．that |
I have many friends, ____ some are businessmen．
| A．of them | B．from which | C．of who | D．of whom |
The car has been well maintained and is _____ excellent condition．
| A．in | B．under | C．on | D．with |