The road was covered with sand ________ the heavy sandstorm.A. because of B. because C. for d. as
People in America and Canada usually make __________to celebrate Thanksgiving Day.
Here are some flowers ___________ you __________ our best wishes.
__________ is spoken the most widely in the world.
Be __________, and you will do well in the English exam.
The accident happened ______ a cold winter morning.