19." After a confused silence , the speaker attempted a weak reply only to halt midway to
confer with his assistant and finally to admit that he had made a mistake." The two infinitive phrases after " midway " are used to ( )

51、( )he needed money for a new car, he decided not to borrow it from the bank.

50、Language belongs to each member of the society, to the cleaner( )to the professor.

49、The children prefer camping in the mountains( )an indoor activity.

48、( ), he can now only watch it on TV at home.

47、The indoor swimming pool seems to be a great deal more luxurious than( ).

46、If your car( )any attention during the first 12 months, take it to an authorized dealer.

45、She remembered several occasions in the past( )she had experienced a similar feeling.

44、John is( )hardworking than his sister, but he failed in the exam.

68、Animals that could not( ) themselves to the changed environment perished and those that could survived.

67、Am I to understand that his new post ( ) no responsibility with it at all?