1. In communication, a smile is usually __________ strong sign of a friendly and __________ 

open attitude.

A. the, /                           B. a, an                        C. a, /                          D. the, an

2. I walked up to the top of the hill with my friend, __________ we enjoyed a splendid view of

the lake.                      

A. where                   B. which                C. who                   D. that

3. -- Silly me! I forget what my luggage looks like.

-- What do you think of__________ over there?

A. the one                      B. this                          C. it                 D. that