_________ is a growing world problem, and nowadays the United Nations and its member countries _________hard to deal with it．
#6050
A
Desertification; are working
B
Desertified ; worked
C
Desert; work
D
Desertification; have worked
推荐题目
They received a number of _____ from customers about the lack of parking facilities.
#6611
A
complains
B
complaints
C
complainer
D
complainers
The selfless village doctor treated whoever came to his family without any_ _.
#6121
A
cost
B
payment
C
charge
D
price
She found a lot of______were______.
#7428
A
passers-by; grown-ups
B
passers-bys; growns-up
C
passers-bys; grown ups
D
passers-by;growns up
We should bear in mind that social development and balance of nature should go in .
#6149
A
company
B
sympathy
C
association
D
harmony
His private actions are in direct __________ with his publicly expressed opinion.
#7020
A
conversation
B
contradiction
C
contribution
D
connection