________the latest estimates，insects account for probably 4 to 6 million of the species of creatures living on the planet.
| A．Owing to |
| B．According to |
| C．In spite of |
| D．In case of |
20.—I’m looking for a house. I’d like ____ with a big garden.
—Yes， madam. We have several of this kind.
| A．that | B．it | C．this | D．One |
19.The prices of goods kept ____. We had to cut the expenses in order to meet our daily needs.
| A．standing up | B．breaking down | C．going up | D．putting up |
18.Seldom ____ him recently， for you see I’m preparing for the project.
| A．I meet | B．do I meet | C．I have met | D．have I met |
17.I wonder what’s your attitude ____ the problem ____ yesterday.
| A．in； discussing | B．to； to be discussed |
| C．towards； discussed | D．with； being discussed |
16.The shopping center in the city was ____ as a result of a cigarette， which shocked the whole country.
| A．burned down | B．turned down | C．turned up | D．taken in |