________ if you want to do something, or you won’t be able to do it well.
I used to love that film ______ I was a child, but I don’t feel it that way any more.
You’d better not leave the medicine ______ kids can get at it.
He found it increasingly difficult to read, ______ his eyesight was beginning to fail.
31. -----Do you have a minute? I’ve got something to tell you.-----Ok, ______ you make it short.
I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian get back.