Choose the best answer: 1. The beach_____________the students are cleaning up the trash is a beautiful one. A. where B.which C.who D.whom 2. Elephants,____________come from Africa,can live until they're seventy. A.they which B.that C.which D.they 3. HCM city,_________,I live, lies on the River Sai Gon. A. which in B. which C. in where D.where 4. They never forget their trip to Hue,_____was the old capital of Vietnam,under the Nguyen dynasty. A.which B.where C.in which D.that