Smile to the world, ______ the world will smile back to you.
| A．nor | B．but | C．or | D．and |
If we work with a strong will, we can overcome any difficulty, _____ great it is.
| A．what | B．how | C．however | D．whatever |
The man ____ visited our school yesterday is from London.
| A．who | B．which | C．whom | D．when |
The woman ____ is talking to my mother is a friend of hers.
| A．whose | B．who | C．whom | D．which |
Because of my poor memory, all ____ you told me has been forgotten.
| A．that | B．which | C．what | D．as |
Do you remember those days ____ we spent along the seashore very happily?
| A．when | B．where | C．which | D．who |