1. Lately, .............. nobody using the library

there has been

it has been

has been

been

2. By the time we left the dance, ................ that she was not feeling well

there was obnvious

an obvious

it was obvious

to be obvious

3. I'd like to see you tomorrow as ........... several things we need to discuss

there have

they are

it is

there are

4. ..............colds are caused by viruses

that the knowledge

it is known that

to know that

the knowledge that

5. I was pleased to see that........... several easy recipes for cake in this cookbook

there are

it is

to be

are there

6. ............... one hour for me to get ready for work in the morning

Usually taking

to take it usually

It usually takes

Usually takes it