When I came into the teacher’s office, he ________ on the phone.
| A．was speaking | B．spoke | C．had been speaking | D．had spoken |
With the on－going campaign of banning cigarette，the number of people who have given up smoking________．
| A．is increasing | B．increased |
| C．has increased | D．will increase |
The video，Gangnam Style，is becoming the first video________ more than one billion views．
| A．got | B．getting | C．to get | D．gets |
The problem is so complex that I'm afraid it will take me several hours to________．
| A．figure out | B．set out |
| C．break out | D．put out |
The newlylearnt words will be impressed on us only if they are ________used in everyday communication．
| A．gradually | B．accurately |
| C．familiarly | D．frequently |
The car's________ has improved a lot since a new engine has been applied to it．
| A．character | B．performance |
| C．appearance | D．attraction |