I’ve kept up a friendship with a girl whom I was at school ________ twenty years ago.
| A．till | B．with |
| C．about | D．since |
School children must be taught how to deal with dangerous ________.
| A．states | B．conditions | C．situations | D．positions |
When Jane began to take swimming lessons, her main _____ was the fear of water.
| A．evidence | B．crisis | C．obstacle | D．danger |
Finding information in today’s world is easy. The ______ is how you can tell if the information you get is useful or not.
| A．ability | B．competition | C．challenge | D．knowledge |
It is no ______arguing with Bill because he will never change his mind.
| A．use | B．help | C．time | D．way |
Of the seven days in a week. Saturday is said to be the most popular _______ for a wedding in some countries.
| A．way | B．situation | C．event | D．choice |