It was not what Tom said but what he wrote in the letter ______ touched his mother.
| A．what | B．which | C．that | D．who |
Ten thousand dollars a large sum of money.
| A．are | B．is | C．were | D．seem |
Very few his address in the town.
| A．knows | B．know | C．are knowing | D．has known |
Not only the workers but also the machine not there.
| A．are | B．were | C．is | D．has |
When and where this took place still unknown.
| A．are | B．were | C．is | D．has |
I know that all getting on well with her.
| A．was | B．is | C．are | D．were |