Question 10: The cost of living in this metropolitan city is _____________ that in the one where I used to live. A. so high as B. as highly as C. twice as high as D. twice more expensive than Question 11: There has not been much supply of fresh water recently, _____________? A. has there B. C. have there D. Question 12: _____________in the States to tip the hairdresser. A. practice B. habit C. tradition D. behaviour Question 13: Please turn _____________ the radio a little bit as I cannot hear anything. A. on B. off C. up D. down Question 14: The sound of firecracker was common on previous Tet holidays, but it is now prohibited _____________ being dangerous and unsafe in production and distribution. A. because B. due to C. since D. despite Question 15: Rapid urbanisation _____________ the decline in the farming area in many countries over the last 20 years. A. is causing B. caused C. has caused D. has been caused Question 16: He seemed to be _____________ because he was the only one who wears casual clothes at the event. A. embarrassed B. embarrassing C. embarrasses D. embarrassment