—You were out when I dropped by your house. — Oh, I_________ in Zhongbai Supermarket with my parents.
They still can’t decide ________ with our difficulties in learning math.
Everybody tells us we can’t pass the exam ________ we study hard.
– How do you learn English, Tony? – I usually practice English ________ chatting with my American friends.
---------Would you mind _________me carry the heavy box? ---------____________.
Which of these sentences is correct ?