It rained heavily, so we _______ stay at home watching TV or surfing the Internet all day. A. could B. had to C. must
—Do you think yesterday’s math problem was difficult? —Yes. I could ________ work it out.
—Is the woman a teacher? —Yes. She teaches ________ English.
This is my beautiful school _______ is near the famous library.
--- Can you tell me ______ on the Internet? --- OK, mum.
Thousands of houses _______ by the floods in Guangxi last month.