1. Those who have not received the invitation he should leave. ?

They should leave

he should be leaving

No improvement

should leave

Answer: should leave

Explanation:


2. The exam was not so easy that we had expected. ?

as easy as

as easy so

such easy as

No substitution required

Answer: as easy as

Explanation:


3. The authorities are looked on the matter ?

No substitution

are looked into the matter

are looking into the matter

are looking on the matter

Answer: are looking into the matter

Explanation:


4. Yesterday I saw my brother to repair his friend’s bicycle. ?

my brother repairs his friend’s bicycle.

my brother repair his friend’s bicycle.

my brother having repaired his friend’s bicycle.

No improvement

Answer: my brother repair his friend’s bicycle.

Explanation:


5. It was him who encouraged I when I was feeling low. ?

No substitution required

he who encouraged me

he who encouraged I

him who encourages me

Answer: he who encouraged me

Explanation:


6. Scarcely had the passengers boarded the plane when the captain welcomed them. ?

that the captain welcomed them

than the captain welcomes them

when the captain had welcomed them

No improvement

Answer: No improvement

Explanation:


7. I try to solve this problem at least for two hours. ?

Am try to solve

Have been trying to solve

Tried to be solving

No improvement

Answer: Have been trying to solve

Explanation:


8. I am really looking forward to meet you ?

No improvement

to meeting you

to have met you

to be meeting you

Answer: to meeting you

Explanation:


9. South Asia, reaching from Afghanistan in the west to Bangladesh in the east, is home to at last six hundred languages belonging to six large language families. ?

No improvement.

home to at least six hundred languages

home to at least six hundred language

home to at most six hundred languages

Answer: home to at least six hundred languages

Explanation:


10. She is taking all kinds of medicine wherever she goes. ?

was taking

No substitution required

takes

took

Answer: takes

Explanation: