He slipped(溜进) into the classroom without ___________.
Tens of thousands of people starved to _____ when the two countries were at war.
. ______ many people’s expectation, he was defeated in the first round.
I could hardly believe he ______ have been taken in by such a simple trick.
In fact, the chances of anybody ______ by a whale are rather low.
If we had not been ______ by the traffic jam, we would have arrived an hour earlier.