Mary sings English songs well and ______. [ ]

.I was about to get on the bus __________my wife phoned me to back home at once.

Mr. Lee ____ to a student when I entered the classroom this morning.– He is very patient ____he is young.

Look, what’s that over there, under the tree?—It’s _________e-dog. It is my cousin’s.

I don’t know how to begin a talk with Betty. She can sit all day long ______ a word. [ ]