Spring water slowly flows through the cavern, ______ limestone. 

Viết lại câu so sánh sau: She gets fat. She feels tired.

San Francisco lies on the coast of Northern California. The earliest Europeans to discover the area were led by a Spanish explorer (1)______ name was Gaspar de Portola.

Samuel started keeping a diary in 1997. 

–> Samuel __________________.

Robert has not had a job for two years. Robert has been .................

Always maintain a queue while waiting (1)______ a bus. Never stand on queue on the middle of the road.

Where was Rebecca Stevens from?

She doesn't live in London because she doesn't know anyone there. 

=> _____________________________.