句型转换They have been learning Chinese for three years.____ ___
句型转换
They have been learning Chinese for three years.
____ ____ _____ they___ learning Chinese?
The girl doesn't know what to wear.
改为含有宾语从句的复合句.
The girl doesn't know_____ ______ ___ ___
They have been learning Chinese for three years.
____ ____ _____ they___ learning Chinese?
The girl doesn't know what to wear.
改为含有宾语从句的复合句.
The girl doesn't know_____ ______ ___ ___
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