How I regretted ___the hours in the forest, ___I should have studied hard in the classroom.
| A．wasting; when | B．to waste; when |
| C．wasting; where | D．to waste; where |
Though ________ money, his parents managed to send him to school.
A. lacked B lacking of C. lack ofD. lacking
from the moon, our earth, with water seven percent of its surface, appears as a “blue ball”.
| A．Seeing…covered | B．Seen…covered | C．Seeing…covering | D．Seen…covering |
Nuclear energy may be dangerous if
| A．controls | B．not controlling | C．not controlled | D．controlled |
All of us, Jane，will make a trip to London next month.
| A．include | B．included | C．including | D．is included |
Mike lost the pen he paid 10 yuan.
| A．to which | B．which | C．for that | D．for which |