Water can absorb and give off a lot of heat without big changes in temperature, thus creating a ______environment.
| A．stable | B．sensitive |
| C．common | D．peaceful |
.A computer is so useful a machine ________ we can use everywhere.
| A．that | B．which | C．as | D．what |
— Why didn’t you come to Mike’s birthday party yesterday?
— Well, I ____, but I forgot it.
| A．should | B．must | C．should have | D．must have |
I the hobby of fishing as a child.
| A．built up | B．set up |
| C．kept up | D．took up |
—I had a good holiday at my uncle’s.
—________ .
| A．Oh, that’s very nice of you | B．Congratulations |
| C．Oh, I’m glad to hear that | D．It’s a pleasure |
—How long do you think it is ________ he arrived here?
—No more than half a year, I believe.
| A．when | B．that | C．before | D．since |