A.did; do | B.do; do | C.do; did |
A.Where did your grandpa work? | B.Where do you work? | C.Where did your father work? |
A.teacher | B.teach | C.teaches |
A.He played Chinese music. | B.He plays Chinese music. |
A.a | B.the | C./ |
A.a young man | B.young and tall | C.a flute player |
A.a | B.an | C.the |