---You know Mr. Green has been ill for days? ---Yes, I wonder if he is _________ better now.
The Prime Minister refused to comment on the rumor that he had planned to _____.
Professor Jordon is well known for his _____ into the habits of the common housefly.
I support your decision, but I should also make it clear that I am not going to be _____ to it.
In spite of the thunderstorm, the children slept _____ all night.
They did not find _____ to prepare for the worst conditions they might meet.