She found it difficult to ______ children’s interest.
A: sustain
B: obtain
C: maintain
D: entertain
A: sustain
B: obtain
C: maintain
D: entertain
举一反三
- More poles are needed to ______ the weight of the tent. A: retain B: B. sustain C: C. maintain D: obtain
- 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 gave up her job as a nurse because she found the children too difficult _____ . A: look after B: to look after C: looking after D: be looked after
- She gave up her job as a nurse because she found the children too difficult . A: look afte B: to look afte C: looking afte D: e looked afte
- Yet, it is becoming increasingly difficult to maintain a positive outlook on our capacity to sustain healthy and happy populations in the coming century.