America belongs to the ___country while China and India are both ___countries.
| A．developing; developed | B．developed;developed | C．developed;developing | D．developing;developing |
The disease, ________, could spread very fast.
| A．unless well controlling | B．if not well controlled |
| C．when not to control | D．although not being well controlled |
To prevent cybercrime more efficiently, it is important to make new laws and create international standards for them similar to________concerning international airspace.
| A．that | B．what | C．one | D．those |
I________have gone the concert because I know nothing about that kind of music.
| A．couldn’t | B．mustn’t | C．shouldn’t | D．oughtn’t |
．—Why are the housing prices in big cities going up all the time?
—One reason is that people are________into overcrowded cities in great numbers.
| A．breaking | B．filling | C．pouring | D．hurrying |
John is________ than wise. Sometimes he just can’t do things very well.
| A．more brave | B．braver | C．very brave | D．no braver |