David doesn’t give up _______ he has failed in the experiment four times.
—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.
______ more, and you’ll improve your spoken English.