IDENTIFY THE UNDERLINED PART THAT MUST BE CHANGED TO MAKE THE SENTE...

5/ - ĐỀ THAM KHẢO TNTHPT ANH 2010 SỐ 10
Tiếng Anh ĐỀ THAM KHẢO TNTHPT ANH 2010 SỐ 10

5/ Identify the underlined part that must be changed to make the sentence correct:

My mother lets me to go on picnic when I am free

A B C D