______most of the guests____ to the 2009 Euro-Asia Economic Forum in Xi’an attended the forum punctually.
A invited B to invite C being invited D had been invited
From time to time a crocodile has snatched someone _______ he or she is even aware that the crocodile is there.
| A．when | B．until | C．since | D．before |
_____ unemployment and crime are high, it can be assumed that the latter is due to the former.
| A．Before | B．Where | C．Unless | D．Until |
—I’m sorry．That wasn’t of much help．
— Oh, _______ . As a matter of fact，it was most helpful．
| A．sure it was | B．it doesn’t matter | C．of course not | D．thanks anyway |
______with several kinds of flowers and plants, our school looks much more beautiful．
| A．To be planted | B．Planting | C．Having planted | D．Planted |
Merry________ as a secretary in the company for five years, but now she is a general manager of the company．
| A．worked | B．has worked | C．is working | D．works |