Tom’s dog became ill and died,____ made him very lonely.
| A．this | B．that | C．which | D．what |
– How did you make contact with the travel agent, Tom？
– Oh, that’s easy. I surfed the Internet and then called one _____ the telephone number is provided.
| A．that | B．in which | C．of which | D．whose |
I was caught in a traffic jam for over an hour, otherwise I ________ you waiting for such a long time.
| A．will not keep | B．have not kept | C．had not kept | D．would not have kept |
– Amazing! You _____ have won the first prize in the national English speech contest!
– I’m lucky that all my efforts have finally paid off.
| A．must | B．may | C．can | D．should |
A qualified doctor has to constantly update his knowledge in order to maintain his professional _____.
| A．conscience | B．competence | C．conservation | D．convenience |
We all consider _____ significant that we should cancel the order immediately.
| A．how | B．which | C．this | D．it |