Choosing to visit the Shanghai Expo on a late afternoon can make you see two to three times as many of the most popular pavilions between 6 pm and closing time ____ you hurry.
There were signs here and there, _____ visitors to look out for ______ rocks.
She has ______ that doctor for three months.
Although ______ for many years, the two old sisters recognized each other at once.
He lay in bed, with his eyes ______ up at the ceiling and his fingers ______.
—______? —Yeah, it seemed a little confusing to me at first, but now I get it.