— Our classroom is clean every day.
—___________.It’s our duty to keep it clean and tidy.
A. So we are
B. So is it
C. So it is
—Oh，I’ve left my bag in the room .
—Don’t worry . I’ll _________it for you .
A. bring B. fetch C. take
The lady in this photo_____ be over fifty! She looks so young.
A. mustn’t B. must C. can’t
-Is Lucy or Lily the_____ of the twins?
-Lucy .She was born half an hour earlier.
A. younger B. older C. elder
The bus was_____ people, so we had to wait for the next one.
A. fill with B. full C. full of
Two days _____not enough for me to finish the work I need _____day.
A. are, other B. is, a third C. are, another