Hoose the underlined part that needs correction in the following question

hoose the underlined part that needs correction in the following question.
 
   I  didn"t  have  enough patience   waiting  for Jenny. She"s always  turning up  late. 
      A                         B        C                                               D
 
 A.enough patience 
 B.didn"t
 C.turning up 
 D.waiting
12Choose the correct answer to the following question.
 
3-D printing _______ complex tools and components.
 
 A.is used to produce
 B.uses for producing
 C.uses to produce
 D.is used for produce
13More and more young people are doing voluntary work abroad. The wild variety of jobs and destinations available is (25) ______ it an increasingly attractive option for those who have just left school and have a year free before university. Many choose to spend these twelve months working in poor countries. There they will earn little (26)______no money. But they will be doing something useful – and enjoying the experience.
     The work may (27)_________of helping the local communities, for example by helping to build new road or provide water supplies to isolated rural villages. Other projects may concentrate more on conservation or environmental protection. (28)__________kind of job it is, it is certain to be (29)______ and worthwhile, and an experience that will never be forgotten.  
CHOOSE THE ANSWER BELOW TO FILL IN THE 
BLANK NUMBER 25
 
 A.taking
 B.getting
 C.doing
 D.making
14More and more young people are doing voluntary work abroad. The wild variety of jobs and destinations available is (25) ______ it an increasingly attractive option for those who have just left school and have a year free before university. Many choose to spend these twelve months working in poor countries. There they will earn little (26)______no money. But they will be doing something useful – and enjoying the experience.
     The work may (27)_________of helping the local communities, for example by helping to build new road or provide water supplies to isolated rural villages. Other projects may concentrate more on conservation or environmental protection. (28)__________kind of job it is, it is certain to be (29)______ and worthwhile, and an experience that will never be forgotten.  
CHOOSE THE ANSWER BELOW TO FILL IN THE 
BLANK NUMBER 29
 
 A.attractive
 B.challenging
 C.difficult
 D.dangerous
15Choose the correct answer to the following question.
 
The examiner made us ______ our identification in order to be admitted to the test center.
 
 A.showing
 B.showed
 C.show
 D.to show 
16Choose the word(s) CLOSEST in meaning to the underlined word(s) in  the following question.
 
Speakers are too  bulky . You cannot put them in your bag or your pocket.
 
 A.tiny
 B.large
 C.light
 D.portable