Who is the woman in black?— ________ is our physics teacher.

_______ one and a half months enough for the project to be finished?—I am afraid not. The professor is ill and only after he recovers ________ go on with it.

____ in1943 _____ the harmful smog made its appearance in Los Angeles.[ ]

Super Junior is ________ great group. I really like their songs and dances.

Excuse me．Could you please tell me?—Certainly．Take the escalator to the second floor and turn left, There is a bank next to the drugstore.