1 . China’s National Day is on October 1st. This year is her ________ birthday.

A．sixty

B．sixtieth

C．seventy

D．seventieth

2 .

seventy       valuable       suggestion       laugh       unless

1. While watching the film yesterday, I couldn't help ________ at some humorous moments.
2. More and more people have realized that clear water and green mountains are as ________ as mountains of gold   and silver.
3. We all felt very proud when we were watching National Day celebrations for New China's ________   birthday on October 1, 2019.
4. The article gives students some ________ about how to stay safe online.
5. Our business won’t improve ________ we offer better service to our customers.

3 . All the Chinese people warmly celebrate China's _______________ (71) birthday.

4 . Our motherland will celebrate her ________ birthday this year. (seventy)

5 . My grandfather showed great courage in the face of serious illness when he was in his ________. (seventy)

6 . My grandpa is old. He is ________ years old.

A．five

B．sixteen

C．twenty

D．seventy

7 . We are proud of our country. The year 2019 is her ______ birthday.

A．the seventy

B．seventieth

C．the seventieth

8 . We are proud of our motherland. The year 2019 is her            birthday.

A．seventy

B．seventieth

C．the seventieth

9 . -There are thirty girls and twenty boys in my class.
-So there are______ students in your class

A．forty

B．fifty

C．Sixty

D．seventy

10 . --- How old is your grandpa?   ---He is seventy-nine years old and next year he’ll be ________.

A．sixty

B．seventy

C．eighty

D．ninety