填空题How long have you been c__stamps?填什么
"How long have you been
How long have you been learning english?什么意思
How long have you ___Beijing?选填been in/been to /gone to 请分别解
How long have you been skating?
how long have you been playing basketball ?
How long have you been swimming?
How long have you been ____?
1.How long have you been here?
how long have you been ---work?
“How long have you been watching
how long have you been 用法
How long have you been in China?