The newly-built shopping mall provides goods that compete ______ product quality, reliability and above all variety

The US is China’s biggest export market, ________ more than 70 percent of China’s exports.[ ]

So mysteriously ______ missing that many puzzles wait to be solved.

Do you have any difficulty _____ English— Yes, but I try to make myself _____.

It is still a problem ______ to hide the stolen money