_______ the students' homework, the teacher found a lot of mistakes.
A: When he was correcting
B: When he corrected
C: Correcting
D: all the above
A: When he was correcting
B: When he corrected
C: Correcting
D: all the above
举一反三
- ____ the notice, he had an idea. A: When he was watching B: Watching C: When watching D: all the above
- The students was just about to ________ the questions， when suddenly he found the answer.
- He made a mistake, but then he corrected the situation ____________ it got worse. A: until B: when C: efore D: as
- When he arrived, he found ____________the aged and the sick at home.
- When the soldier came to, he found he ______ by an old woman