They boy said ________ couldn’t he work out the problem but his teacher didn’t know how to do it.
—Excuse me! How can I get to the nearest post office?—Walk along this road for a few minutes, and you’ll it there.
Lily is popular among her classmates ______ she can be annoying at times.
We all consider ______ important that we should put theory into practice.
Just like fingerprints, each person’s DNA is ________unless he has a twin.
The boy felt quite happy because he was closer now to ______ an answer of his own.