— I have got a headache.
— No wonder. You in front of that computer too long.
| A．work | B．are working |
| C．have been working | D．worked |
【原创】I’d also like to ______ you on your good performance in these two years.
| A．congratulate | B．celebrate |
| C．thank | D．hope |
【原创】In my English teacher’s opinion ,the best way to understand thousands of new words is to gain ______ good knowledge of basic word formation.
| A．/ | B．the | C．a | D．one |
After losing contact for twenty years, they met again _________ in a party．
| A．by mistake | B．by coincidence |
| C．on purpose | D．on display |
Nobody knows how the accident _________．The police are investigating it．
| A．came out | B．came about |
| C．came in | D．came down |
I tried to telephone Mary last night, but I couldn’t ________ after trying again and again．
| A．get through | B．get off |
| C．get into | D．get down |