If your baby has a fever, you should take him to see a doctor_______.
This ticket _____ one adult and one child to the show.
My son has gone abroad. I’m looking forward to him_______.
It is good manners to eat up _______is left in your plate.
Can you explain ________ the sun goes down in the west?
A huge amount of oil was spilt on the East Sea, the causes of ______ are still under investigation.