there were ___ tourists i the zoo during national day a.thousand of b.thousands of c.two thousandsd.two thousands of

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there were ___ tourists i the zoo during national day a.thousand of b.thousands of c.two thousandsd.two thousands of
there were ___ tourists i the zoo during national day
a.thousand of
b.thousands of
c.two thousands
d.two thousands of

there were ___ tourists i the zoo during national day a.thousand of b.thousands of c.two thousandsd.two thousands of
b
解析:thousand,hundred这种词,若前面有具体数字,就不要加上s,如果没有具体数目,就要加上s,并在后面加上介词of
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