If you meet trouble, you can ______ your friends ________ help.
He makes ________ by selling clothes in the supermarket, so he lives _______.
—I haven’t been to an aquarium.--________.
--He didn’t go to the lecture this morning, did he?--__________Though he was not felling very well.
Excuse me. Do you know________.
--________ the population of Sichuan?--90 million people.