In the meantime, the question facing business is whether such research is________the costs.
| A．valuable |
| B．worth of |
| C．worthy of |
| D．worthwhile |
He went to Nanjing ___ October, 2008.
| A．in | B．on | C．at | D．to |
Information technology is taught in most schools, ________ we have entered the information society.
| A．so | B．while | C．still | D．for |
My aunt has worked in a clinic ____2008.
| A．after | B．before | C．till | D．since |
My father is leaving ___ Shanghai tomorrow.
| A．for | B．in | C．into | D．to |
___ the morning of June 27, they visited the Great Wall.
| A．In | B．At | C．On | D．From |