Soldiers are trained under conditions that closely ______ real army inspection of PRC on National Day in Beijing.

the crowded bus ______, who was dressed in ablack suit, waving to a woman

Einstein’s Theory of Relativity is so________that most of us can not understand it.[ ]

Do you have anything in mind _____ you’d like for supper?—Well, _____ is okay with me.

The young girl sitting next to me on the plane was very nervous.She ______before