Among the crises that face humans ________ the lack of natural resources.
A: is
B: are
C: is there
D: are there
A: is
B: are
C: is there
D: are there
举一反三
- What are the most important natural resources in Canada A: [A] Forest resources. B: [B] Mineral resources. C: [C] Water resources. D: [D] Agricultural resources.
- It is wrong to _________ our natural resources.
- Which of the following is not mentioned as a possible cause of a trade imbalance（） A: Low labor and material costs in Asian countries. B: A lack of natural resources. C: An underdeveloped industrial base. D: The high cost of exported items.
- ____ that this region was so rich in natural resources.
- Things from Earth that people use are ___________. A: animal resources B: human resources C: natural resources