________the good old days，he couldn’t help smiling.
| A．Looking back at | B．Looking on |
| C．Looking forward to | D．Looking into |
Could I speak to __________ is in charge of International Sales please?
| A．who | B．what | C．whoever | D．whatever |
The little girl who got lost decided to remain __________ she was and waited for her mother.
| A．where | B．what | C．how | D．who |
Green is usually regarded as a __________ of life while red stands for joy and victory.
A. symbol B. sign C, mark D. signal
It's rude __________ you to ask his salary the first time you __________ him.
| A．of；meet | B．of；met |
| C．for；meet | D．for；meet with |
We should consider the students' request __________ the school library provide more books on popular science.
| A．that | B．when | C．which | D．where |