问题

_____ important for us _____wild animals and birds.
A:Did; helped
B:Does; helped
C:Does; helps
D:Did help;
B:Does; helped
C:Does; helps
D:Did help;
正确答案是:
同类题型
There is a general but false assumption _____ intelligent people do better in life.
Do you know the workers built _______180-metre-long bridge over the river— Really That’s amazing.
Excuse me, MadameIs this plane _____take off soon?—Oh, yesIn five minutes
Where are you going this month We_________ go to Xiamen, but we’re not sure.