Since the first space mission many communication satellites ……………………..
A. was launched
B. are launched
C. have been launched
D. had been launch
Câu trả lời là: C là đáp án đúng
Công thức nguyên hàm và tích phân
Since the first space mission many communication satellites ……………………..
A. was launched
B. are launched
C. have been launched
D. had been launch
Câu trả lời là: C là đáp án đúng