Choose the best answer

----- Nội dung dịch tự động từ ảnh -----
Question 45 [826441]: That pipe
A. has been leaking
B. would take
Question 46 [826427]: I used my calculator.
Question 47 [826431]: How many musical scales can you distinguish in the musical scale?
A. is it
B. it is
Question 48 [826044]: You __________ to our conversation. It was private.
A. haven't been listening
B. couldn't have been listening
C. shouldn't have been listening
D. there are
Question 49 [826245]: The President __________ had changed
A. would deliver – changed
B. was going to deliver – changed
C. delivered – had changed
D. was delivering – changed
Question 50 [826426]: The Angkor complex represents __________, the entire range of Khmer art from the 9th to the 14th century.
A. represented
B. represents
C. represent
D. would have taken