--- Is this company ______ your elder sister once worked in?
---- Yes, it is.
| A．where | B．which | C．the one | D．that |
All of __ sudden , I saw __ UFO with _____ alien in it flying in front of my house.
A. the ; the ; a B a ; the ; a C. a ; an ; an D. a ; a ; an
_________he is the son of the boss, he started from the lowest position as a common employee.
| A．Unless | B．Since | C．While | D．As |
Following the guide, we went into a house, _________ wall hung a picture of Einstein.
| A．on its | B．on that | C．on whose | D．on which |
Mr. Keller _________ forty cigarettes a day until he gave it up.
| A．had smoked | B．smokes | C．have smoked | D．smoked |
—Excuse me, can you spare me a few minutes?
—_________?
| A．What’s on | B．What’s up | C．What is it | D．What’s more |