荆门培训打击乐器:帮忙选择啊 还要说明原因 谢了啊
来源:百度文库 编辑:查人人中国名人网 时间:2024/04/29 15:41:20
-When did you first ( )English?
-When I was only 8 years old.
A.learned B.learn C.learning D.learns
-When I was only 8 years old.
A.learned B.learn C.learning D.learns
B
DID助动词
后面用原形
B
did 助动词``后面跟原形`