In the following words，which underlined letter has a different sound from the others？（ ）
| A． |
drum |
B． |
husband |
C． |
pull |
How are you getting on with your cousin？
Very well． He is really _______ and joins in all kinds of activities in his spare time． （ ）
A．politeB．strictC．activeD．careful
A research suggests that walking helps people live longer．
I quite agree， but it_______ on when and how they walk． （ ）
A．remainsB．separatesC．returnsD．depends
In the past five years， China has played an important role in the Belt and Road．
It has__________ many nations a great chance to communicate． （ ）
A．offeredB．supportedC．includedD．directed
It is reported that a kind of new smart phones can test the air quality（质量）around you．
__________fast the technology develops! （ ）
A．WhatB．What aC．HowD．How a
________ you _______the Chinese Culture Festival in the Central Square？
Yes． It was really a great success.( ）
A．Are；attendingB．Will；attend
C．Do；attendD．Did；attend