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 |
Eby is ____ a bad stage, always picking fights with his brother for no reason at all.
| A．going over | B．going through | C．giving in | D．giving up |
---I hear that Thomas ____ his holiday in South Africa.
---Yes. He’s prepared for his trip.
| A．spent | B．has spent | C．is spending | D．was spending |
The teacher insisted that I ____ a mistake and insisted that I ____ the physics problem again.
| A．made; did | B．made; do | C．make; do | D．make; did |
Without more wood ____ the fire, it would soon go out.
| A．added to | B．adding to | C．added up | D．adding up |
The workers are talking about the doctors and the offices ____ they visited yesterday.
| A．which | B．who | C．that | D．where |