Our share of the market has____sharply this year.
| A．decreased | B．developed | C．gathered | D．applied |
Using many symbols makes _______ to put much information on a single map
| A．possible | B．it possible |
| C．that possible | D．it is possible |
__________ medical science has achieved control over several dangerous diseases, what worries us is that some of them are returning.
| A．Since | B．Unless | C．However | D．Although |
I remember __________ the factory owned a small workshop and two machines.
| A．when | B．how | C．whether | D．what |
She has been teaching in a school since she graduated, so she is not __________ to associating with business people.
| A．addicted | B．devoted | C．accustomed | D．admitted |
__________ a certain doubt among the workers as to the necessity of the work.
| A．There existed | B．It existed | C．There had | D．It had |