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
____________the outbreak of COVID﹣19 is a terrible blow to the country， the government is trying hard to bring the situation under control．（ ）
A．AlthoughB．IfC．Unless
The film My People， My Country， which amazed lots of movie﹣gors，_____to the top of the Chinese box office last Monday．（ ）
A．jumpB．jumpedC．jumps
_________you have problems， just let me know． I'll always be there for you．（ ）
A．HoweverB．WhateverC．Whenever
We are glad_____that traditional Chinese medicine can work wonders in preventing some diseases．（ ）
A．knowB．to knowC．knowing
A Chinese survey team reached the top of Mount Qomolangma_____May 27th，2020，which will improve human knowledge of nature and scientific development．（ ）
A．atB．onC．in