1. He ___ playing the piano to answer the door A.let off B.let out C.put off D.put out 2. since their establishment two years ago , the advic centre has seen over 500 people A. their B. ago C. over D. week 3. although they are twins they are___ apart in their attitude to life A. gates B. lakes C. miles D.words 4 this research seems to give some validity to the ___ that the drug might cause cancer A. theory B. fame C. reaction D. lesson 5 the building scheme comes as an enormous BOON for the building industry A. source B. gift C. obstacle D. help 6. they were both CRITICALLY injured in the accident A. slightly B. vaguely C. verbally D. seriously 7 .computer literacy is now as essential as the___ to drive a car A. amount B. repair C. ownership D. ability 8. those seats are reserved for senior members___ the club A. of B. over C. by D. from