______, the damage would be incalculable.
A: Should such a disaster occur
B: If such a disaster had occurred
C: Had such a disaster occurred
D: If such a disaster should be occurred
A: Should such a disaster occur
B: If such a disaster had occurred
C: Had such a disaster occurred
D: If such a disaster should be occurred
举一反三
- Chemical leaks have had a ____effect on wildlife. (disaster)
- What category can disaster film be divided into？ （ ）。 A: Natural disaster film. B: Fantastic disaster film. C: Epidemic disaster film. D: Man-made accidental disaster film.
- What kind of disaster film does 10.5 belong to? ( ) A: Man-made accidental disaster film. B: Epidemic disaster film. C: Natural disaster film. D: Fantastic disaster film.
- "We have some accidents on this line, but no accidents ______ since last winter." A: had occurred B: have occurred C: occur D: are occurring
- "We have some accidents on this line, but no accidents ______ since last winter." A: had occurred occurring B: have occurred C: occur D: are