Fill in the blanks with the words given in brackets. Make changes or add something where necessary.

This is the question________ (which) we have had so much discussion.

That is the reason____________(for) he is leaving so soon. 

Fill in the blanks with an item as required.

With an appropriate relative pronoun or relative adverb:
Edison finally found a place in the cellerhe used as his first laboratory. 

Fill in the blanks with an item as required.

With an appropriate relative pronoun or relative adverb:
To avoid the various foolish opinions tomankind is prone, no superhuman genius is required. 

Fill in the blanks with an item as required.

With an appropriate relative pronoun or relative adverb:
The retired engineer had valuable experience onwe depended for the success of the project. 

Fill in the blanks with an item as required.

With a relative pronoun or a relative adverb:
There are two Johnsons in our class, and the scholarship goes to the Johnsonplays on the school soccer team.

Fill in the blanks with an item as required.
With a relative pronoun：
The girl in the red dress​ ​            is talking to the teacher is Tom’s sister.

Rewrite the following sentences as required.

Using a relative clause：
She is a professor I know. She can give you advice.

Rewrite the following sentences as required.

Combining the two sentences by using a relative clause:
James Russell is a man. I have the greatest respect for him.

Fill in the blanks with an item as required.
​With a relative pronoun:
The man in the grey suit ​           is talking on the phone is our new English teacher.

Fill in the blank with the words given in bracket. Make changes or add something where necessary.

There wasn't any directory in the telephone box ​              ​ (which) I was phoning. 

Correct one error in each of the following sentences.

​Dr. Sales is a person I don't have much confidence.

Rewrite the following sentence as required.

Combining the two sentences by using a relative clause:
Global warming is one of the greatest challenges.
Each and every country on this planet has to face the challenges.

Correct one error in each of the following sentences.

​Whatever is his defense, we cannot tolerate this disloyalty.

Rewrite the following sentences as required.

Combining the two sentences by using a relative clause:
The policeman picked up the child. The child’s arm was broken.

Correct one error in each of the following sentences.

The other day, he met a lady whom he thought was wearing the strangest hat he had ever seen.

Rewrite the following sentences as required.

​Using a relative clause:

I was the boss man. I had to keep a clear mind at the critical moment.

Rewrite the following sentences as required.

​Combining the two sentences by using a relative clause:

I remember the morning. He first came to school.

Correct one error in each of the following sentences.

The police finally caught up with the man whom they thought was the escaped prisoner.

Using a relative clause:
This is the only one of the many houses here. This was destroyed by the earthquake.