Before a problem can be solved, it must be obvious ______the problem itself is.
| A．what | B．that | C．which | D．why |
.--- Hi ,Tracy, you look tired.
--- I am tired. I ____the living room all day.
| A．painted | B．had painted |
| C．have been painting | D．have painted |
Americans eat______vegetables per person today as they did in 1910.
| A．twice as much | B．as twice many | C．twice as many | D．as twice much |
---The boy looks ____.
---I know.He failed the exam, and now he is looking_____at his father.
| A．sad;sad | B．sad;sadly | C．sadly;sadly | D．sadly;sad |
一、单项选择（共15小题；每小题1.0分，满分15分）
In ____ 1980s, great changes have taken place in ____ China.
| A．/; the | B．the; / | C．a; / | D．the; the |
---- Did you find the film interesting?
----________, I nearly fall asleep half way through it.
| A．However | B．On the other hand | C．At the same time | D．On the contrary |