There is no doubt _____ they will win the game.
| A.that | B.when | C.why | D.what | 
It is playing computer games _______ he spends so much time that he fails all the exams
| A.which | B.what | C.in which | D.that | 
  The train he was looking forward to ______ only a few minutes ago.
  A arrives B arrived C arriving D had arrived
C arriving D had arrived
Persons under 16 ______ not be employed in our country.
| A.shall | B.can | C.may | D.will | 
 Selecting a proper personal computer is no easy task because technology _____ so rapidly.
 A will change B will have changed C is changing D has changed
You’d better give the task to _____ can finish it ahead of time.
| A.whomever | B.whoever | C.anyone | D.no matter who |