Schools in the north tend to be better equipped, ______ those in the south are relatively poor.
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.
John _____ knowledge of radio just by staying around the radio station.