What they need ______ enough money, while what we need ______ enough workers.
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.
Once harm ______ to the environment, it takes years to have the system recovered.