_____ on May Day, the Shanghai Expo has attracted tens of thousands of visitors around the world every day．
| A．Having opened | B．Opened |
| C．Opening | D．To open |
I think he is taking an active part in social work. I agree with you ___________.
| A．in a way | B．on the way | C．by the way | D．in the way |
It took a long time for the connection between body temperature and illness ___________.
| A．to make | B．to be made | C．making | D．being made |
Work gets done __________ when people do it together and the rewards are higher too.
| A．easily | B．very easy | C．more easily | D．easier |
24.—I don’t think I need to buy that toy penguin—it’s for kids.
—__________you don’t have kids, buy it anyway because it looks good.
| A．As if | B．Even if | C．In spite of | D．Even so |
—Have you worked here since you graduated?
—No, I ____________at a factory in Beijing for six years.
| A．would work | B．have worked | C．had worked | D．worked |