America will never again have as a nation the spirit of adventure as-考呗网

单选题 America will never again have as a nation the spirit of adventure as itbefore the West was settled.

A．could
B．did
C．would
D．was

【答案】B。解析：本题考查助动词。句意为“作为一个国家来说，美国将不再具有开拓西部前所具有的那
种冒险精神”。从意义来看，空格应填had，但主句中have是实义动词，为避免重复，可用助动词d0替代，即用 did替代had。故选B。

1 There is a real possibility that these animals could be frightened, ______ a sudden loud noise.

A．being there
B．should there be
C．there was
D．there have been

2 Just as tea and banana can't go together,should the son of a low-class family expect to marry the daughter of a nobleman.

A．either
B．not
C．neither
D．nor

3 I am______grateful for the many kindnesses you have shown to my son.

A．excessively
B．much
C．certainly
D．exceedingly