Only in this way, directed by the teacher, ______work out the problem the day before.
A: had they
B: they could
C: could they
D: did they
A: had they
B: they could
C: could they
D: did they
举一反三
- He ________ to the teacher for help, but he chose to work the problem out himself. A: could have gone B: could go C: was able to go D: had been able to go
- the Kiowas had to fight because only in this way could they survive in the environment.
- Only in this way _____ communicate well. A: could we B: we could
- You___ the work better in the future. A: could did B: can does C: could do
- _____ his father came out of prison _____ Dickens have chance to go to school. A: Not before; had B: Only before; would have C: It was until; had D: Not until; did