He is not good at learning English and he always does his homework_______.

don’t understand how you should spend so much money in only one month. Please ________ each sum of the money you spent to me.[ ]

Tom studied hard and tried _____ the exam.

The process of curing a disease is like awar ___ different soldiers fight against an enemy.

Would you mind not picking the flowers in the garden? They are _____everyone’s enjoyment[ ]