I failed in the job interview and only then _____ the importance of learning English well.
| A．I realized | B．I had realized | C．did I realize | D．had I realized |
At the age of 29, Dave was a worker, _______ in a small apartment near Boston and ______ what to do about his future.
| A．living; wondering | B．lived; wondering |
| C．lived; wondered | D．living; wondered |
When he ______the door, he found his keys were nowhere.
| A．would open | B．opened |
| C．had opened | D．was to open |
In April, 2009, President Hu inspected the warships in Qingdao,_______the 60th anniversary of the founding of the PLA Navy.
| A．marking | B．marked |
| C．having marked | D．being marked |
______not to miss the flight at 15:20, the manager set out for the airport in a hurry.
| A．Reminding | B．Reminded |
| C．To remind | D．Having reminded |
Later, I wanted to return home but couldn't find a companyI could useI had learnt.
| A．that;what | B．when;what |
| C．where;what | D．where;that |