He didn't go by bike with me.That's ________ there was something wrong with his bike.
In the USA, he made a lot of friends ______ English well to make himself ______.
Please tell me the way you thought of ______ the garden.
Whom can you trust, if not _______ ?
She reached the top of the hill and stopped ______ on a rock by the side of the path.
The result of the experiment was very good, _____ we hadn’t expected