We are all aware _________ the many threats _________ the environment and we need to take action to prevent us from the bad consequences.
It was for this reason _________her uncle moved out of New York and settled down in a small village.
I feel it is your husband who_______ for the spoiled child.
It is these poisonous products _______can cause the symptoms of the flu, such as headache and aching muscles.
It was ____ I met Mr Green in Shanghai.
Was it because he was ill ____ he asked for leave?