The children were found ________in the cave.
A: trapping
B: trapped
C: be trapping
A: trapping
B: trapped
C: be trapping
举一反三
- A rescue worker risked his life saving two tourists who＿＿in the mountains for two days. A: are trapping B: have trapped C: were trapping D: had been trapped
- The police managed to_____ him into revealing his true identity. A: trap B: trapping C: be trapped D: have trapped
- trapping mechanism:
- 离子障（ion trapping）
- 名词解释牵制机制( trapping mechanism)