--- Kitty, do you know ______?
---Sure, about forty minutes.
A. when did their class meeting begin.
B. where their class meeting was held
C. how often their class meeting is held
D. how long their class meeting will last
Frank often wears a mask _____ he can keep fit in the foggy and hazy (霾) weather.
A. only if B. until
C. so that D. even though
When the sun ___ in the east, the little hero tried hard ___ the red flag to the top of the pole.
A. rising… to rise B. rose… to raise
C. rose… raising D. rising… raising
—_______ do you like _______ the picture on the wall?
—The colour.
A. What, about B. How
C. How, of D. What, of
—My daughter has passed the exam. 
—Congratulations! She’s really excellent.
— ____________.
A. No, no, she is nothing B. Oh, thank you
C. Sometimes she is intelligent D. You are right
—We must act now because time is _______.
—Yes. Let’s start.
A. coming out B. giving out
C. cutting out D. running out
