The birds that will spend the whole winter here have been digging holes in the snow _______ from the cold weather.
| A．to shelter | B．sheltered |
| C．having sheltered | D．sheltering |
It was wrong of you to from all your friends who helped you when you were in trouble．
| A．break away | B．break down | C．break into | D．break out |
He has difficulty in remembering lines，buthe is a good actor
| A．in addition | B．all in all | C．as a result | D．at most |
In after-school activities,students areinto different groups accirdubg to their interests．
| A．In addition | B．provided | C．collected | D．appointed |
—Why didn’t you attend his wedding ceremony?
一Well …，I．
| A．wasn’t invited | B．haven’t been invited |
| C．hadn’t invited | D．haven’t been inviting |
It was because of hard trainingthe sportsman won the gold medal in the competition．
| A．how | B．that | C．why | D．which |