11. Nemo: _____ there a lot of fish in the river before? Doris: Yes, but there _____ only trash now.
問題詳情
11. Nemo: _____ there a lot of fish in the river before? Doris: Yes, but there _____ only trash now. (A) Was; is (B) Did; has (C) Were; is (D) Was; are