﹣Don't forget to keep a safe distance（距离）at least one meter， Jack!
﹣____________．（ ）
A．Sorry， I won'tB．No， I can't do it
C．Not at allD．I hope not
I_____you here， but you didn't come．
I'm terribly sorry． I was so busy that I forgot．（ ）
A．would expectB．was expecting
C．am expectingD．have expected
Can you describe____？
Yes． I was walking when a bike knocked me down from behind．（ ）
A．why did the accident happen
B．when did the accident happen
C．how the accident happened
D．where the accident happened
As an American， Tom is a big fan of Chinese kung fu．____， he is crazy about Beijing Opera．（ ）
A．ThereforeB．HoweverC．MoreoverD．Otherwise
Manager， all the machines____just now!
What？ Call the engineer at once．（ ）
A．broke downB．turned down
C．broke outD．turned out
Lights are out． The concert is to begin． The fans hold their breath for Jay Chou's_____．（ ）
A．influenceB．guidanceC．experienceD．appearance