4. Although John Loud who was an American inventor designed the first ballpoint pen, his ballpoint pen didn’t really work.

Combine the sentences using non-defining relative clauses (Kết hợp các câu sử dụng mệnh đề quan hệ không xác định)

1. The fridge was invented by Jacob Perkins. It was created in 1835.

2. Peter Henlein invented the watch in 1505. He was a German clockmaker.

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

1. You don’t look very well. Where’s the …? Let’s check your temperature.

Write sentences using the prompts. (Viết câu bằng cách sử dụng gợi ý)

1. Karl Benz - German engineer - modern car in 1886