When did the custom begin？ The custom began in （）.
举一反三
- When did the custom of dueling begin
- I’d like to know ________ Chinese. A: when he began to learn B: when did he begin to learn C: when did he begin learning D: when did he began learning
- Only when father came back ______ to have supper. A: we began B: began we C: did we begin D: we would begin
- I don’t know ____ to learn English. A: when did he begin B: when he began C: he when began D: when he begins
- 4. I don’t know _________ to learn English. A: when he begins B: when did he begin C: when does he begin D: when he began