—Which of these two books will you take?—I’ll take ______, in case the journey is boring.
. What a pity! He got nothing in ______ for his hard work.
. ______ your timely warning, we would have been unaware of the danger.
. The question then ______ that the supply of drinking water in the mountainous area is serious.
.We could hardly believe what she says because she is ______ changing his mind.
. . —OK, $ 500, but that is my last offer.—_______.