1.it was.....that we all felt surprised

A. so beautiful flower show

B. so beautiful a flower show

C. such beautiful flower show

D. too beautiful flower show

=> It + is / was / ... + such + a / an + adj + N + that + Clause

2. His friends ......... that he made up the whole story himself

A. believe B. are believing

C. are believed

D. were believed

=> Chủ động đặc biệt : S + V + that + Clause

3. There....... a secret tunnel between those two houses.

A. people say is

B. people say has

C. is said to be

D. is said to have

=> BĐ Đặc biệt : S + is / am / are / ... + VpII + to do sth

`1`.`C`

`\rightarrow` It + is / was / ... + such + a / an + adj + N + that + Clause

`=>` Quá ... đến nỗi mà ...

`2`.`A`

`\rightarrow` Chủ động đặc biệt : S + V + that + Clause

`3`.`C`

`\rightarrow` BĐ Đặc biệt : S + is / am / are / ... + VpII + to do sth

`\text{# TF}`