1. She works at a hospital. 2. Не уверена под "сад" имеется в виду "огород" или "детский сад", напишу оба варианта. Is your brother working in the garden now Is your brother working in a kindergarten now - yes, he is. 3. The secretary sends letters to London every week. 4. They dont often watch TV. 5. Mary is hoovering the rug (или the carpet). She always does it on Mondays.