I _______in London for many years，but I’ve never regretted my final decision to move back to China.
| A．lived | B．was living | C．have lived | D．had lived |
Tom kept quiet about the accident ____ lose his job.
| A．so not as to | B．so as not to |
| C．so as to not | D．not so as to |
He wrote to his friends ______ information.
| A．asked for | B．to ask for | C．ask for | D．asks for |
Old McDonald gave up smoking for a while, but soon _____ to his old way.
| A．returned | B．returns |
| C．was returning | D．had returned |
What _____ to Joan last night? What did she cry for?
| A．was happened | B．happened |
| C．was happening | D．had happened |
_____ is the population of your country?
| A．How | B．what | C．How many | D．How many |