________crime in this area has increased so much over the last 20 years?
| A．Why is it that | B．Why it is that |
| C．Why was it that | D．Why it was that |
________everyone here，I wish you a pleasant journey back to your country.
| A．By means of | B．On behalf of |
| C．In search of | D．For fear of |
I am always delighted when I receive an e－mail from you.________the party on July 1st，I shall be pleased to attend.
| A．On account of | B．In response to |
| C．In view of | D．With regard to |
An artist who was recently traveling on a ferry to the southern island discovered________a long lost antique Greek vase.
| A．at random | B．by chance |
| C．in turn | D．on occasion |
Mrs.Smith finds it hard to clear up the mess，as her children are always ________ whenever she tries to.
| A．in the way | B．on watch |
| C．in sight | D．on the line |
Before you pay a visit to a place of interest, look in your local library________a book about it.
| A．on | B．at | C．for | D．to |