Butterflies ________ a sweet liquid produced by flowers, which bees and other insects collect.
| A．carry on | B．feed on |
| C．put on | D．focus on |
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 |