【2015·安徽】______ the difference between the two research findings will be one of the worst mistakes you make.
----I didn’t see her yesterday. ---- Of course, you ____, because he had gone for a trip..
Using renewable energy sources is a simple idea, but ______ we find it hard to put into practice.
When you come here for your holiday next time, don’t go to ___ hotel; I can find you ____ bed in my flat.
Bob, quickly get this film ____. I want to know if this camera works well.
Swimmers must be very strong in order to build up speed because of the high resistance of the water. Runners, ____, must struggle against the heavy resistance of the air and ground.