The local government has been accused of not responding _________ to the needs of the homeless in the flood-stricken area．

The rain was heavy and _____ the land was flooded.

 I want to see him       he arrives. Which of the following is wrong.

I always_____follow the instructions of my doctor when taking medicine.

As is known to all language learners, newly learnt words will soon be forgotten unless ______ used in everyday communication.