Who was the first person__________the South pole?

Đáp án C.
Tạm dịch: Ai là người đầu tiên đến Nam Cực?
Kiến thức cần nhớ
Cách rút gọn mệnh để quan hệ dùng to infinitive:
- Khi danh từ đứng trước có the only, the first, the second,... the last, so sánh nhất.
Ex: Tom is the last person who enters the room.
= Tom is the last person to enter the room.
John is the youngest person who takes part in the race.
→ John is the youngest person to take part in the race.
- Khi có động từ have/ has/ had
Ex: I have much homework that I must do.
→ I have much homework to do.
- Đầu câu có Here (be), There (be)
Ex: There are six letters which have to be written today.
→There are six letters to be written today.