1、 Professor Chen asked us to write ______ essay on individual differences in second language learning. 

2、 Her voice is ______. 

3、 That so many advances have been made in ______ is the most valid argument for retaining the research unit. 

4、 ______ curriculum includes all experiences which the students may have within the environment of the school. 

5、 Since taxi fare in the city may run ______ twenty dollars, I suggest that you take a bus. 

6、 If negotiations for the new trade agreements take ______, critical food shortages will develop in several countries. 

7、If he had followed the directions carefully in taking the medicine, he would have felt better ______.  

8、Since he spent his childhood in France, Jack is able to converse in French ______. 

9、Of the two cars that the Smiths have, the Plymouth is, without any question, ______. 

10、With ______ three inches of rain falling in a six-month period, the farmers found it necessary to irrigate the land