摘要： Only after he realized the significance of mastering two languages English carefully. A. did he set about learning B. did he set out learning C. had he set about learning D. had he set out learning
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Only after he realized the significance of mastering two languages ______ English carefully.
A. did he set about learning B. did he set out learning
C. had he set about learning D. had he set out learning
查看习题详情和答案>>Only after he realized the significance of mastering two languages __________ English carefully.
A. did he set about learning B. did he set out learning
C. had he set about learning D. had he set out learning
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Only after he realized the significance of mastering two languages ______ English carefully.
- A.did he set about learning
- B.did he set out learning
- C.had he set about learning
- D.had he set out learning
Only after he realized the significance of mastering two languages ______ English carefully.
| A．did he set about learning | B．did he set out learning |
| C．had he set about learning | D．had he set out learning |