With nine months _______,we feel sad that our school life will be ending for we’ll have to say good-bye.

I got to the office earlier that day，________the 7∶30 train from Paddington.(2013·大纲全国，25)

______ almost all our time to our schoolwork in the past three months, we have almost no time for fun and play．

After half a year’s training, they were made entirely used   ____     underwater.

Taobao．com has begun selling tickets online for international flights，      to cut the market share of Ctrip．corn and other competitors．