Fill in the blank: 'He is proficient ________ mathematics and logic.'

Choose the correct preposition to complete the sentence: 'The teacher divided the chocolates ________ the four children.'

Fill in the blank with the suitable preposition: 'The patient passed ________ peacefully in his sleep last night.'

Fill in the blank with the correct preposition: 'He has been suffering from fever ________ Monday last.'

Fill in the blank with the correct preposition: 'He is junior ________ me in service by two years.'

Fill in the blank with the correct preposition: 'Smoking is harmful and he is addicted ________ playing video games.'