--- This book by Tony Garrison is of great use for our course. --- But I think his latest one is ______ worth reading.
So suddenly ________that the animals in the zoo looked very frightened during the total solar eclipse (日全食).
—Have you finished your book report?—Not yet. I couldn't________on it with so loud music next door last night.
Once we have________some knowledge, things do not become more difficult, but comprehensible.
The chief editor demanded that the article ________immediately.
Tom is a promising student. I am sure that with his________effort, he will make a very successful scientist.