WHEN I ……. IN NEW YORK LAST YEAR, I …….. LOTS OF INTERESTING PLACES A....

Câu 20: When I ……. In New York last year, I …….. lots of interesting places A. am / visited B. was / visiting C. am / visiting D. was / visited III. Tìm một lỗi sai (A, B, C hoặc D) trong mỗi câu sau.