TY  - GEN
AU  - Fuchs,Marjorie
TI  - Focus on grammar: a high-intermediate course for reference and practice 
SN  - 0201383012
AV  - LE PE1128 F951f 2000
U1  - 428.24 
PY  - 2000///
CY  - Estados Unidos de América
PB  - Longman
KW  - Inglés - Estudio y enseñanza
N2  - Present and past, review and expansion, negative questions and tag questions additons and responses
ER  -