-How long ( ) you ( ) in Singapore?-For just the weekend.I'll be back next Monday morning.A.have;stayed B.are;staying C.did;stay D.do;stay写出选择的原因,

HOW long are you legs How long have you been how long have you been learning english? How long have you been studying? how long does it take you? how long do you exercise every How long have you been in China? 英语问答 How long were you away? how long have you been dancing today? HOW long will you stay there how long have you studied in this How long have you been there? How long ago did you start school? how long do you go to school how long do you read every night? how,spend,did,there,long,you(?) p44 how long were you away? How long have you live in China