2. Read the sentences in exercise 1 again. Then choose the correct answer to complete the rule.
(Đọc lại các câu trong bài tập 1. Sau đó chọn câu trả lời đúng để hoàn thành quy tắc)
RULE
We use questions in the present perfect to ask ...
a. if a person experienced something at some time.
b. an exact time when a person experienced something.
Bài Làm:
We use questions in the present perfect to ask ...
a. if a person experienced something at some time.