C. My students have been being taught by me for 15 minutes
D. My students was being taught by me for 15 minutes
Jawaban: C
13. She has made cookies since two hours ago
A.The cookies was made by her since two hours ago
B. The cookies have been made by her since two hours ago
C. The cookies is made by her since two hours ago
D. The cookies has been made by her since two hours ago
Jawaban: B
The picture below is for the questions number 14 to 17!