The little boy is dirty from head to foot because he ________ in the mud all morning.
| A．has played | B．is playing |
| C．has been playing | D．was playing |
The president promised to keep all the board members _________ of how the negotiations were going on.
| A．inform | B．informing | C．be informed | D．informed |
What’s the noise ? It sounds as if it comes from upstairs.
--______. It must be the window-cleaner working , next door.
| A．I’m not sure | B．I hope not | C．I’d rather not | D．I don’t think so |
Parents now believe that there are obvious differences in their approach to educating children compared with _____ of their parents.
| A．those | B．that | C．one | D．ones |
Some young people in America are expected to leave ______ could be life’s most important decision---marriage--- entirely up to luck.
| A．which | B．that | C．what | D．as |
He said he didn’t regret telling the truth but felt that he ______ it differently.
| A．could have expressed | B．could express | C．must have expressed | D．would express |