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
Khi được giúp đỡ, hãy ghi nhớ; khi giúp đỡ, hãy quên đi.
When befriended, remember it; when you befriend, forget it.
Benjamin Franklin
