12.Learning English is a difficult but happy

____________ 

.

A) program 

B) progres 

C) process 

D) problem

13. The writer told the children that she________quite a few detective stories in the last few years.

A) wrote 

B) has written 

C) was written 

D) had written

14. Hi, could you please tell me ________ your father has gone to Sydney?

A) when

B) how often

C) how long

D) if

15. The movie star is afraid that she will be recognized as she _________ at the airport.

A. arrives

B. arrived

C. will arrive 

D. arrive

16. Mr. King doesn't know what time ________ back home yesterday evening.

A. does his son come

B. his son comes

C. did his son come

D. his son came

17.I'm sorry

-

 children over five________ pay the full entry price to the show.

A) can

B) may

C) should

D) must

18. John _____ off his bike and hurt himself while he ______.

A)fell,were riding 

B) had fallen,was riding 

C) fell,was riding 

D) had fallen,rode

19. Arthur’s memory starts to go wrong because of his age. So does ______.

A) I 

B) mine 

C) me