The traditional view is ______ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
—How long have you been in this office?
—Just a few minutes. My cousins__________here together with me.
| A．have walked | B．had walked | C．walked | D．have been walking |
In America, _____ car is _____ popular means of transportation.
| A．the; a | B．a; the | C．the; the | D．the; / |
—I would like to buy an expensive camera.
—Well, we have several models________.
| A．to choose from | B．to choose | C．to be chosen | D．for choice |
I remember _____the factory owed a small workshop and two machines.
| A．when | B．how | C．whether | D．what |
—What should we pay more attention to if we go north in winter, Mum?
—Nothing much. Take warm clothes________ the weather is cold.
| A．as long as | B．now that | C．if | D．in case |