— Oh, really? Can Doris read through it in such a short time?— She covered the English novel ______ it took me, still less a simple story．

Two middle-aged passengers fell into the sea. _______, neither of them could swim.

To understand the grammar of the sentence, you must break it       into parts. 

The houses in this village are______built of bricks.

I’m afraid we can’t come, but thanks for the invitation_________.