The China Foreign Exchange Trading System says it will ______ direct trading of the Chinese yuan against the Singapore dollar beginning Tuesday.
Misunderstandings arising from lack of social communication, if not ______ properly, may lead to serious problems.
Worldwide markets get tighter and the pain only lasts longer ______ international cooperation is strengthened in no time.
The situation in Haiti after the earthquake was all in a mess, ______ the increasing number of robbery cases.
Measures must be taken before there is another collapse of the coal mine, ______?
Look at the naughty boy! You ______ have taught him how to behave himself.