4. The air conditioner will turn off … if there is no one in the room for more than twenty minutes.

Fill in the blanks using the words in Task a. (Điền vào chỗ trống bằng các từ trong Bài a.)

1. Can you help me … the box onto the motorbike? I don’t want it to fall off when I drive.

2. This invention is a cup. The cup has a phone holder built into its lid.

Combine the sentences using defining relative clause. (Kết hợp các câu bằng cách sử dụng mệnh đề quan hệ xác định.)

1. The noodle fan is a portable fan. It can be attached to chopsticks to cool noodles for you.

4. Is this the store … you bought that cool jacket?

2. Last summer, we went to a resort that has a … beach. Only the guests at the resort can use it.