In the past few years, it has been a trend for Chinese universities to build new campuses,

In the past few years, traffic problems （become) ________ more and more serious.

Now scientists have found in the past few years ______.A．the exposure of DNA to the public

The number of books in this library has been increasing considerably in the past two years

Why did the intelligence test become unpopular in the past few decades？A．Its validity was

In the past few years the workers have______ a lot of suggestions, some of which are being

AIDS is said() have been the biggest health challenge to both men and women in that area over the past few years.