We will wait for you __________ you come.
until
Tom smiled __________ he was sad.
though
__________ I have a stomachache, I have to go to the hospital.
Because(Since,As)
__________ you exercise, you won't stay healthy.
Unless
My mom has gained some weight, __________ she is on a diet.
so
I was sleeping __________ my sister was reading.
while
I think __________ she is kind.
that
__________ they are poor, they seem happy together.
Though
__________ you don't hurry, you'll be late.
If
__________ I go to school, I have breakfast at home.
Before
I studied so hard __________ I passed the exam.
that
I wondered __________ he was at home.
if(whether)