40. I could have offered you some help last weekend, but I ______ with my work at that time.
| A．would be occupied | B．was occupying | C．had been occupied | D．was occupied |
Since you have made such good preparations, there ______be any problem about passing the coming exam．
| A．mustn’t | B．shan’t | C．shouldn’t | D．needn’t |
______to use in April,2005,the road has solved the long-standing problem of traffic jams of this area．
| A．Put | B．Putting | C．Having put | D．Being put |
Try the new cleaner．Just a few minutes every day—that’s all it takes—______you could have shining floors and furniture．
| A．and | B．but | C．or | D．so |
．I’d like to settle down somewhere ______the climate is mild and the sun shines all year long．
| A．which | B．that | C．where | D．when |
My grandpa sowed the flower seeds in the garden ______it was the best time for them to grow．
| A．where | B．when | C．that | D．until |