1. Don’t worry too much about making ____ mistakes. They are _____ natural part of learning.
A. /; a B. the; / C. /; the D. the; the
2. She decided to buy the house windows faced the blue sea.
A. whose B. which C. of which D. its
3. You’d better have some candles in the house _____ the electricity is off.
A. in that case B. as long as C. in case D. so that
