Mr. Black’s car is broken. So he has to go ____ his bike to school.
---Your classroom report is so wonderful.---I wrote for 3 hours ___________ I finished it.
The flight to Toronto was __________ because of the heavy snow.
The digital camera is so great. I’ve never seen a better one before, but the price of it is ______ in the store.
---You are great! Congratulations on winning the first prize! ---Thank you! Mr. Yu You__________ me to practice again and again every day.
If you are careful enough, you will _________ make mistakes in your exams.