---When did you get to know each other ? ----It was in 2008___ we spent summer vocation together.
He didn’t do well _____ Chinese. He had some trouble ______ it.
Can you ______ the difference ______ the two phrases?
The _____ you study, the _____ you’ll be in it.
My sister doesn’t look ______ my mother, but she speaks ____ my father does.
----I’d like to go shopping with you, but I have a meeting _______. ----If you don’t go, ________.