The environment here becomes better and better． birds are coming back．（ ）
| A． |
Hundred |
B． |
Hundreds |
| C． |
Thousand |
D． |
Thousands of |
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