Don’t sit there _______ nothing.Come and help me with this table.
| A．do | B．to do |
| C．doing | D．and doing |
.I doubt very much _____ the tickets for tomorrow have _____.
A that ; been sold away B that ; been sold out
C if ; sold out D whether ; been sold out.
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
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