2.B. At Home: Typical Items

Explanation
The given options are all related to books, but only "A bookcase" is a piece of furniture specifically designed to store books. A bookcase typically consists of shelves or compartments to keep books organized and easily accessible. The other options, such as a bookstore, bookkeeper, and bookmark, are not physical objects used for storing books.

Explanation
The correct answer is "An armchair" because an armchair is a type of chair that is designed for one person and has armrests on each side. It is typically more comfortable and larger than a regular chair, providing a cozy seating option for relaxation or reading.

Explanation
The given options are different household appliances. Out of these options, a washing machine is the correct answer as it is a device used for washing clothes. The other options, dishwasher, oven, and freezer, are appliances used for cleaning dishes, cooking food, and freezing food respectively.

Explanation
The given options are all common household items. A freezer is a compartment within a fridge or a standalone appliance used for freezing food. A cupboard is a storage space with shelves or drawers. A wardrobe is a piece of furniture used for hanging clothes. The correct answer is "A fridge" because it is a common household appliance used for storing food at low temperatures.

Explanation
The given options suggest different household items, and the correct answer is "A microwave." A microwave is an electronic appliance commonly found in kitchens that is used for heating and cooking food quickly. It uses microwaves to generate heat and is designed to be efficient and convenient for everyday use.

Explanation
The correct answer is "pillows" because pillows are commonly found on beds and are often purple in color. Cushions and blankets can also be found on beds, but the question specifies that there are two purple items, which narrows it down to pillows. Dogs are not typically found on beds.

Explanation
The given options suggest different types of clocks, but the correct answer is "An alarm clock." This is because an alarm clock is specifically designed to wake someone up by producing a loud sound at a set time. It is commonly used to ensure that individuals wake up on time for work, school, or other important events. The term "wake-up clock" and "bell clock" are not commonly used to refer to this type of clock, and "noisy clock" is too vague to accurately describe an alarm clock.

Explanation
The correct answer is mirror because mirrors are commonly used to reflect one's image. Since the baby is looking at something, it suggests that the baby is looking at their own reflection in a mirror.

Explanation
This house has blue walls. This statement suggests that the color of the walls in the house is blue.

Explanation
The given sentence states that "The _______ are red or black." This indicates that there is a plural noun that can be either red or black. Among the options provided, only "roofs" fits this criteria. Roofs can indeed be red or black, depending on the material used or the design of the building. Therefore, "roofs" is the correct answer.