. It is the test system, _____ the teachers, that is to blame for the heavy burden of middle school students nowadays.
We hadn’t planned to meet. We met __ chance .
Every morning Helen goes for a jog, with her dog ________ after her.
Only after they had discussed the matter for a few hours _______a decision
Wethe postcards yesterday, but it didn’t arrive.
—A new film will be on tonight. Will you go to see it? —If you don’t go , .