You never know _______ you try something.
—What’s the matter with you? You look so worried.-- I don’t know ___________ the problem.
— In our English study reading is more important than speaking, I think.— I don’t agree. Speaking is _______ reading.
– We didn’t go to South Hill because of ____________. -- What a pity!
–Your skirt is the same colour ____ Lily’s. -- So it is. But my blouse is different _____ hers.
Tony wanted to take some good photos, ______ he lost his camera.