Fill in the blanks with articles where ．
| A．necessary | B．necessarily | C．is necessary | D．it necessary |
Mr. Smith, who often helped passers-by repair their bikes, said that what he did was not paid but _______.
| A．relevant | B．optional | C．suitable | D．voluntary |
At that very moment my mind went completely_______ and I forgot what I was supposed to be doing.
| A．efficient | B．blank | C．shallow | D．abundant |
The challenge Lenovo faces is to develop a global brand that will ________a broader consumer group.
| A．refer to | B．appeal to | C．relate to | D．attach to |
What annoys me most is that every time I ________, he seems to be checking up on me.
| A．turn away | B．turn around | C．turn in | D．turn out |
To our relief, clothes and blankets have been _______among the people in that earthquake stricken area.
| A．distributed | B．separated | C．contributed | D．donated |