THE SEAS AND RIVERS NOWADAYS _____. A. CANNOT BE SWUM IN B. ARE LES...

1. - File thứ 4: de_kiem_tra_lop_11-_sach_cu-_u8-9-10_311201817
File thứ 4: de_kiem_tra_lop_11-_sach_cu-_u8-9-10_311201817
1. The seas and rivers nowadays _____. A. cannot be swum in B. are less dirty than they used to be C. are dirty enough to swim in D. are contaminated