【C3】A．no doubtB．no wonderC．no longerD．no matter

That was so serious a matter that I had no choice

A．noB．any moreC．no longerD．not

【C16】A．overallB．all butC．no longerD．altogether

No matter how hard you try, you can find no parallel existing between them. The underlined

【C6】A．No matter howB．AsC．As long asD．Where

We should provide useful information for the police no matter there is a ______ or no