They were about to fight when their father （）.
A: invaded
B: Participated
C: joined
D: intervened
A: invaded
B: Participated
C: joined
D: intervened
举一反三
- When employees participated in the problem-solving process, they were much more willing to __________ solutions to the problems.
- 请用所给单词的正确形式填空They were quarrelling about the property their father had left them when he _________.（die）
- The president intervened personally _____ the crisis. A: on B: in C: over D: about
- His studies were _________ by the war. A: interrupted B: intervened C: interwiewed
- —When were your legs injured—It was one Sunday last month () my father and I spend at the seaside. A: that B: when C: as D: while