25．With so little time ______ on math, it is all too easy for children to ignore practicing mathematics, which is a kind of language．
| A．spent | B．being spent | C．to spend | D．was spent |
Only when class began ______that he had left his book at home．
| A．will he realize | B．he did realize | C．did he realize | D．had he realized |
They will fly to Washington, ______they plan to stay for two or three days.
| A．which | B．where | C．there | D．when |
The explanation of our teacher will make the reading easy ______.
| A．to be understand | B．to understand | C．understood | D．understanding |
When the clock __________ twelve o’clock, Cinderella suddenly remembered her godmother’s words and rushed away from the prince.
| A．struck | B．beat | C．alarmed | D．settled |
----Look! Where are you going? ---Sorry. I _______________.
| A．wasn’t noticing | B．am not noticing. | C．don’t notice. | D．haven’t noticed |