1 . You will be surrounded by three-D images, sounds and other sensory information, ________creates a super-realistic effect called “presence”. (用适当的词填空)

2 .          is well known to us, Tianjin has a history of more than 600 years.

A．As

B．What

C．Where

D．It

3 . The fire started on the first floor of the hospital,          patients were elderly people.

A．many of whose

B．whose many

C．many whose

D．many of whom

4 . Fifteen competitors started the race last year, only three of              managed to finish.

A．which

B．whom

C．who

D．that

5 . 通过广泛阅读，我希望我能扩大词汇量，这对提高英语至关重要。(用定语从句) (汉译英)

6 . 几次尝试都失败了，这令她心烦意乱。

7 . Volunteers in China, _______ are playing an increasingly important role in many fields, are actively participating in the battle against COVID-19 at present.

A．which

B．that

C．who

D．where

8 . My mother was too busy to remember my birthday, ________ made me a little upset.

A．which

B．that

C．whom

D．what

9 . The Mid­autumn festival falls on August 15th of the Chinese lunar calendar, ________people of a family get together and enjoy the dinner together. (用适当的词填空)

10 . I practiced running almost 3km every day, ________helped me improve my pace.(用适当的词填空)