The traditional view is ______ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
I am too tired. I _____ my homework all morning.
A have been doing B did C do D have done
_____ we know, Mr. Black is an expert on language teaching.
A As B That C Which D What
–You are twenty minutes late.
--Sorry, my car _____ on my way here.
A broke up B broke off
C broke away D broke down
This milk doesn’t taste _____ this morning.
A well B nicelyC good D lovely
The letter is from my sister, _____ is working in Beijing.
A which B that C whom D who