điền liên từ vào chỗ trống 
ai làm giúp mình mỉnh tặng 5 sao (mình chỉ chọn đáp án đầu tiên)
----- Nội dung dịch tự động từ ảnh -----
E1. This exercise is challenging
it is helpful.
2. I am going to the beach,
3. My little brother dreams of becoming a pilot
I buy some sunscreen.
he wants to travel around
the world.
24. The singer is suffering from sore throat,
25. Tomorrow is my sister's birthday,
he won't perform tomorrow.
I am making a cake for her.