—I left my handbag on the train, but luckily someone gave it to a railway official.
—How unbelievable to get it back! I mean, someone ________ it.(2011·江苏)

—Pity you missed the lecture on nuclear pollution.
—I________it, but I was busy preparing for a job interview.(2011·福建)

I ________ through that bitter period without your generous help.(2011·陕西)

We ________John's name on the race list yesterday but for his recent
injury.(2011·江西)

     our earth, or else it will be no longer fit for us to live on.

—I can never forget the days       we spent together in the summer camp.
—Well, especially the day       it suddenly began to rain in the middle of the night.

At no time       the rules of the game. It was unfair to punish them.

The scientists recommend that studies ________ to find out what side effects the medicine might cause.

An advertisement is useful in ________ it lets customers know of the kinds of goods in the shops.

The special medicine for the disease was difficult to find though ________
everywhere.