As ________ rule, apples are sold by ______ weight and eggs by _______dozen.
| A．a; 不填；the | B．a; the; the | C．a; a; the | D．the; 不填；不填 |
Without the air to hold some of the sun’s heat, the earth at night _____ too cold for us to live.
| A．would be freezing cold | B．will be freezing coldly |
| C．would be frozen cold | D．can freeze coldly |
It sounds like a good idea, but it _________ to be seen whether it will succeed.
| A．leaves | B．remains | C．stays | D．reminds |
---Did you go to the show last night?
--- Yeah． Every boy and every girl in the area ____ invited．
| A．were | B．was | C．has been | D．have been |
you may have , you should gather your courage to face the challenge .
| A．However serious a problem |
| B．Whatever serious a problem |
| C．However a serious problem |
| D．No matter how a serious |
He was seriously injured．He lay on the ground, _______ to stand up．
| A．was unable | B．being not able |
| C．unable | D．being able not |