Those flowers were 　　　　 for your mother on her seventieth birthday， but as she is away， I would be glad if you accept them.

Tom was over there. His red clothes stood out clearly ________ the snow.

Millions of people have been forced to leave their homes ______ the heavy storms and floods.

 What I’m interested in is radios and telephones, so I’d like to study __________ Engineering during my four years in university.

—What was the trouble with you yesterday?— When I practised running on the playground, my strength _____ and I fell onto the ground.