小华双休日帮妈妈做家务：用全自动洗衣机洗衣服用30分钟；扫地用8分钟；擦家具用16分钟；晾衣服用5分钟．经过合理安排，做完这些事至少要花（　　）分钟．

    ①English people have three meals（餐） a day. They are breakfast, lunch and dinner.

    ②They have breakfast at about 7:00 to 8:00 in the morning. They often eat or drink some fruit or juice first, and then they have some porridge(粥)，eggs and meat. Some English people like to take sugar (糖） in their porridge, and some like to put salt in it.

    ③For many people, lunch is a quick meal. Many of the office workers don't go home for lunch. They often buy a hamburger or sandwich in fast food shops. School children can have a hot meal at school, but many students only take a sandwich, a drink and some fruit from home for lunch.

    ④Dinner is the main meal for English people. They have dinner at about 6:00 to 8:00.Many people have dinner with their family at home. People cook it carefully, because they think dinner is very important. They have a lot of food for dinner: soup, fish, vegetables, tomatoes and bread or rice. After dinner they have some cakes, fruit or ice cream for dessert(餐后甜点).

永定土楼是典型的客家民居，它用生土夯筑而成，依山偎翠，错落有致。土楼遍布该县的每个乡村，它们布局合理，与大自然和谐地融为一体，构成了神奇、古朴、壮观、美丽的画卷。据此回答下列各题。