Why not try your luck downtown, Bob? That’s ________ the best jobs are.
| A．where | B．what | C．when | D．why |
--- One of the Fortune Global 500 companies offered her a position, but she refused.
---_________ ? It is a very good chance.
| A．Guess what | B．So what | C．Who cares | D．But why |
Yesterday I witnessed ____ car hit a tree and ___ driver was killed.
| A．A; a | B．The; the | C．A; the | D．The; a |
He kept yawning in class this morning. That is _____ he stayed up late doing his homework last night.
| A．why | B．how | C．because | D．whether |
I want to show you is my gratitude and respect for your continuous and selfless help.
| A．That | B．Which | C．Whether | D．What |
______ we have confidence and determination, we can win the match.
| A．Once | B．Since | C．Unless | D．As long as |