Not everybody attending the meeting agreed to the suggestion ______ by the chairman. 

It took the scientists seven days to________Takla Makan________“the sea of death”.

—What are you reading, Jim? —I’m not really reading, just _____ the pages.

Though the road covered with snow was very smooth, the old man smilingly ____ to be helped by others across the road．

Was it in 1969 ____ the American astronaut succeeded ____ landing on the moon?