They booked a room in the hotel in advance. It wasn't necessary to do so.

37/40

They can't have booked a room in the hotel in advance

They must have booked a room in the hotel in advance.

They needn't have booked a room in the hotel in advance.

They might not have booked a room in the hotel in advance.

Giải thích

Đáp án đúng: C

Giải thích: needn’t have +P2: diễn tả sự việc lẽ ra không cần làm trong quá khứ nhưng đã làm

Dịch: Họ lẽ ra không cần đặt phòng khách sạn trước.