More poles are needed to ______ the weight of the tent.
A: retain
B: B. sustain
C: C. maintain
D: obtain
A: retain
B: B. sustain
C: C. maintain
D: obtain
举一反三
- He built a pair of wings of a size suitable to _______ his own weight, and made use of gravity as his motor. A: entertain B: retain C: obtain D: sustain
- She found it difficult to ______ children’s interest. A: sustain B: obtain C: maintain D: entertain
- 8) Careers Officers ______ contact with young people after they leave school.A. maintain B. contain C. obtain D. detain A: maintain B. contain C. obtain D. detain B: contain C. obtain D. detain C: obtain D. detain D: detain
- 保留，记住____________ A: sustain B: retain
- Weshould_________oilandgasbymakingfulluseofotherenergysources. A: reserve B: conserve C: maintain D: sustain