1 . ________in the regulations that nobody ______any important information concerning the enterprise.

A．What is required; gives away	B．As is required; give away
C．It is required; give away	D．It requires; gives away

2 . We ________ (hire) our bikes from the rental place at the South Gate. （所给词的适当形式填空）

3 . Over the past 3 years, more than one book about space exploration ________ all over the world.

A．were published	B．was published
C．have been published	D．has been published

4 . Picking up her "Lifetime Achievement" award, proud Irene______(declare) she had no plans to retire from her 36-year-old business. (所给词的适当形式填空)

5 . They are trying to make sure that 5G terminals ________ by 2022 for the Beijing Winter Olympics.

A．will install

B．will have been installed

C．are installed

D．have been installed

6 . It is calculated by dividing a person’s weight in kg by their height in meters squared, and a BMI of between 19 and 25 ________ (consider) healthy.(所给词的适当形式填空）

8 . And, as more children were born, more food _______________ (need). （用单词的适当形式完成句子）

9 . A rescue worker risked his life saving two tourists who ________ in the mountains for two days.

A．are trapping	B．have been trapped
C．were trapping	D．had been trapped