No matter how late she comes home, she makes ________ a routine to walk her dog for about an hour.
| A．it | B．this |
| C．that | D．her |
— We did not see him at the lecture yesterday．
— You _______ him, since I went to an international conference with him．
| A．mustn’t have seen | B．can’t have seen |
| C．couldn’t see | D．needn’t have seen |
But when I got _______ the town ought to have been, all I found was a gas station．
| A．where | B．which | C．what | D．that |
The Turners consider ________a computer, which is commonly considered _____a great help in our work and study.
| A．to buy; to be | B．buying ; to be |
| C．to buy; being | D．buying; being |
How cold it is ! We’ve never had ________this winter.
| A．the colder day | B．a cold day |
| C．the coldest day | D．a colder day |
It was at the very beginning ______ Mr Smith made a decision _____we should send for a doctor.
| A．when; which | B．that; which |
| C．when; that | D．that; that |