________ Tom isn't rich enough, he still spends much money on books.
A.Unless B.After C.Although D.Because
“Look before you leap.” is an English saying. It tells us to think carefully ________ we act.
A.after B.as C.before D.when
The two companies decided to work together, ________ they had common interest.
A.because B.though C.while D.until
________ he entered the classroom, he realized he had left his homework at home.
A.As B.Since C.If D.Until
The little boy was sleeping in the bed________ his mother was cooking in the kitchen.
A.since B.while C.because D.once
Jack has learned more about teamwork ________ he joined the soccer team.
A.until B.since C.while D.though
