The trip to that city was eye-opening for everyone, and near its end, all the young people in our group began to reflect on what it had meant. We __21___the first night we had arrived. We had all gone into the markets of the city ___22__the young people could experience its energy. But what we actually saw simply __23__ us all ---- the rundown houses, the children in rags, the people begging for money … Walking home, ___24____ under a low bridge, we came across ___25___ families of homeless people seeking a bit of dry ground to sleep on __26__ the night. We had to step over bodies as we found our way through the darkness.

The exam was ______easier than we had expected.

The experiment was ______ easier titan we had expected.

Only when we hurried to the airport__________the flight was cancelled.

We must cherish experience______at the cost of blood.

______ had we sat down than the telephone rang.

We had ___________ wonderful time_________the party_______ other day.

9．It was________ bad weather ________ we had to stay at home．

10． We had fun ___________ our bicycles to the beach last Sunday．

The author’s experience shows that he was _____.

It was ______ the chief engineer came ______ we began the experiment.

We grew uneasy as the fight was coming _______.