.A smile costs _________， but gives so much. So we should learn to smile.
A. something B. anything
. nothing D. Everything
—will you come back home, Danie? —In twenty minutes. I’ll hurry.
A. How soon
B. How often
C. How long
The question is so difficult that students can answer it.
A. few B. many C. most
---He can play basketball very well. --- .
A. So am I
B. So can I
C. So do I
---is the population of India? ---It’s about 1.1 billion.
A. What B. How many C. Which
—I had no time to travel,I still felt very happy.
A. Because B. Though C. But