Someone called me up in the middle of the night, but he hung up ＿＿ I could answer the phone.

May I trouble you with the question—Sorry，but it is________my knowledge.

I joined the League ________ May, 2009. What about you? –I’ve been a League member _______ three years.

The skier’s red clothes stood out clearly ______ the snow

He stood there for two hours ____ thegame.