The flu is believed ____by viruses that like to reproduce in the cells inside the human nose and throat.
| A．causing | B．being caused | C．to be caused | D．to have caused |
--- What has made him upset recently?
--- __________ alone to face a troublesome milk case.
| A．Left | B．Being left | C．Having left | D．To leave |
I can’t thank you____ much because without your help I ___ have won the first prize.
| A．too; wouldn’t | B．very; shouldn’t |
| C．that; might not | D．so; couldn’t |
He wrote a lot of novels, none of _________ was translated into a foreign language.
| A．them | B．what | C．that | D．which |
--- Isn’t it amazing that I met Francis at the Christmas party?
--- Really? For how many years _________ each other?
| A．didn’t you see | B．haven’t you seen |
| C．hadn’t you seen | D．don’t you see |
--- Really? Who will give _________ lecture?
--- Mr．Wang, ________ famous professor from Nanjing University.
| A．the; 不填 | B．a; the | C．the; a | D．a; a |