Since the last quarter of 2010, there______a rapid fall in the volume of exports in this c

Since the last quarter of 2010, there______a rapid fall in the volume of exports in this country.

A．is

B．was

C．had been

D．has been

请帮忙给出正确答案和分析，谢谢！

您可能感兴趣的试题

By the last quarter the fans were ______ to losing, but two miraculous touchdowns snatched

答案解析
The ______ of the U.S.S.R. has been the most momentous event of the last quarter of the 20

答案解析
The corporation lost $ 5 million this quarter_____a profit of $4 million last year.A．in co

答案解析
How much has the rate of deforestation risen since last year？A．30%.B．27%.C．57%.D．60%.

答案解析
Shopping habits in the United States have changed in the last quarter of the 20th centur

答案解析
At last()quarters of the monkeys in the zoo suffer from nutritional problems.

答案解析
Since the road is wet this morning last night ___.

答案解析