-I wonder why Mr Green hasn’t showed up at the meeting yet.
-I’m not sure, but he _______ in a traffic jam driving here.
| A．could be stuck | B．might stuck |
| C．might have been stuck | D．must have stuck |
A plan has been put forward ________ more graduates should go to work in the country.
| A．when | B．that | C．whether | D．how |
After three hours'climbing，they reached ________ they thought was the place they'd been dreaming of.
| A．what | B．which | C．where | D．that |
Engines are to machines ________ hearts are to animals.
| A．as | B．that | C．what | D．which |
The last time we had great fun was ________ we were visiting the Water Park.
| A．where | B．how | C．when | D．why |
—I prefer shutting myself in and listening to music all day on Sundays.
—That's ________ I don't agree.You should have a more active life.
| A．where | B．how | C．when | D．what |