练习：

　　1,These figures do not ___________ changes in the rate of inflation.

　　2.I wasn't convinced about the________ of the report.

　　3. The inventor was rewarded by the government for his scientific_________.

　　4. Books provide an ideal opportunity to _______ readers with something unknown.

　　5. Bill applies himself with great ardor to the__________ of professional knowledge.

　　take account of, accuracy, achievements, ,acquaintance, acquisition,