i don't know when_____famous A.does he become B.he becomes C

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i don't know when_____famous A.does he become B.he becomes C.did he become D.he become
答案是B还是D呢,太纠结,顺便问一下C中助动词为什么不能加,陈述语序不能加助动词吗?

B 根据选项的这种形式只能是he becomes或者he became
再问： C中助动词为什么不能加，陈述语序不能加助动词吗？
再答：要表达过去做过，直接用he became，不要在前面加did，否则就不是陈述语序了。陈述语序要加did的情况只有否定的时候。比如：I want to know why he didn't come.

i don't know when_____famous A.does he become B.he becomes C .I don't know why .A) he come here B) does he come C) he cam I don't know B.A．where does he live B．what is he doing C．whe 1.I don’t know .A.what does he like best B.what he like best I don’t speak French,_____.A.nor did he B.nor he does C.nor I don't know __ .A.where does he come from B.what is his nam 1.I don't know ] A.where does he come from B,what is his nam I don't know he is _____the football team.( ) A.by B .at C.o -Will he ____ come next month -I don't know so A be able B c i don't know who he is_i let him in a.and b.or c.so If i don't go—— A.so does he B.neither does he I don't know ____.A.what does he like best