For a long time we walked without saying ______ word and eventually Jack was the first to break ______ silence.

Which is more important, English or math —I think English is as _______ as math.

.He is________ to spend his special Children’s Day in Yunnan because of the earthquake..

I can’t find my way．Couldyou tell me ___—Sure．You can take a taxi toget there．

I first met Mr Zhao nine years ago He____ at a chemical college at that time