UNIT 15: SPACE CONQUEST LANGUAGE FOCUS (TRỌNG TÂM NGÔN NGỮ) Grammar and Vocabulary Exercise 1. Dùng could/couldn ’t hay was / wasn’t able to để hoàn tất câu. ĐÁP ÁN 1. couldn’t / wasn’t able to 2. was able to 3. could / was able to 4. was able to 5. could / was able […]
