---___do you like best about Chinese food?----I like dumplings best.
Mark isn't coming to the concert ________________ he has got too much work to do.
-When will you go back to your hometown? - _______.
— Was it under the tree ________ you were away talking to a friend?— Sure. But when I got back there, the bike was gone.
Some families in the countryside were _____ poor _____ pay for the school. We should try our best to help them.
Difficulties are nothing _____we are not afraid of them.