was the trouble with you the day beforeyesterday— When I practiced running, my strength _____ and Ifell onto the ground.

The Dead Sea is so salty ____ it’s hard for anything to live in it, ____ is why it’s called theDead Sea.

lan enjoy seeing his old friendsyesterday—Yes, he did He hisold friends for a long time

30．He added, “President Obama is going to do_____ he thinks is necessary to get our economy moving again.”

He’s from Shanghai, ________ population is the largest of all cities in China.