You’ll fail your next exam you start to work hard.
Linda often helps her mother ______ the housework on weekends.
Nobody thought it is easy to finish so much work in ___________.
________ plenty of fun things to do if you choose the travel path.
The road was covered with sand ________ the heavy sandstorm.A. because of B. because C. for d. as
— Did you enjoy yourself during the holiday?— Yes, we had ____________ in Beijing.