一I'm afraid I have to leave now, for you see, he is waiting for me. ----Well, if you_ , at least wait till the heavy rain stops.
--Who is the person talking with you just now? -- Well, if you ______ know, his name is David.
Alice, _______ university teacher from Australia, teaches me ______ English in her spare time.
It is morning _____ we have four classes, not afternoon.
In the reading room, we found her _____ at a desk, with her attention ______ on a book.
The day I looked forward to ________ at last.