Some new oilfields ________ since 1976.
| A．were opened up | B．will be opened up |
| C．have opened up | D．have been opened up |
Cars_____,theywerepunishedbythepolice.
| A．parkingillegally | B．parkedillegally |
| C．beingparkedillegally | D．havingparkedillegally |
Theysatintheroomwiththecurtains_____.
| A．drawing | B．havingbeendrawn |
| C．drawn | D．beingdrawn |
Thepurse_____,theywenttothepolice.
| A．notyetfound | B．has’tbeenfound |
| C．beingnotfound | D．nothavingyetfound |
Theyfirstreachanagreementonthebasicprinciple,thedetails____later
| A．toworkitout | B．havingbeenworkedout |
| C．tobeworkedout | D．beingworkedout |
Christmas____,thefamilywasfullofexcitement.
| A．wasthenonlydaysaway | B．werethenonlydaysaway |
| C．thenonlydaysaway | D．havingbeenthenonlydaysaway |