new safety system _______ to use, the accident would never have happened.

Today we have chat rooms, text messaging, emailing… but we seem ______ the art of communicating face to face.

30Pupils usually would like to take ________ advice their teachers give

Students in English-speaking countriesusually address their man teacher ‘sir”, but __________ their woman teacher“madam”.

_,he went into the tea-house and seated himself at a little table by the window