Great changes _________ in many fields since China was open to the whole world.
| A．have taken place | B．took place |
| C．have been taken place | D．were taking place |
Living on his own and only having a dog _____ company, the old man feels ______.
| A．in; alone | B．for; lonely | C．as: alone | D．as; lonely |
______ you make a promise, you should keep it.
| A．The moment | B．While | C．Once | D．As if |
My parents insisted that I _____ medicine instead of law.
| A．must study | B．will study | C．had better | D．study |
________ was it that made the singer ______ his Asia Tour Concerts.
| A．What; put off | B．Why; put up | C．How; put away | D．Where ; put on |
He ______ his sister to give up the plan for cycling along the Mekong River, but failed.
| A．persuaded | B．tried to persuade | C．advised | D．Both B and C |