问题

________a certain doubt among the people as to the practical value of the project.
A:It has
B:They have
C:It remains
D:There remains
B:They have
C:It remains
D:There remains
正确答案是:
同类题型
He wanted to look for a(n) _________suited to his abilities.
“We‘ve missed the train!” “_____, there’ll be another in ten minutes”
It comes as ______ surprise that ______ dream of spacetravel will soon come true
With a large amount of equipment________ ,the boss asked the employees to work extra hours.