题目内容：

    A long time________, there was a king in India. The king's favourite game was chess.

One day, a wise old man came to the palace and the king________him to a________. The king________the old man, "You can have________prize if you win the game."

The old man said, "If I win the game, I'd like one________for the first square of the chessboard, two________the second, four for the________, and then double the________for each of the________of the squares."

"Is that all?” asked the king. "Wouldn't you like gold or silver________?”

"No, just rice, " replied the old man.

The king and the old man played the game for a long time, finally, the old man won, so the king ordered his men to collect a bag of rice. He________one grain on the first square, two on the second, and so on. The king quickly ________the problem________with all the rice in the country, he would still not have________to put on all the squares!

1.A.before B.ago C.since D.in

2.A.asked B.wanted C.challenged D.changed

3.A.match B.chess C.play D.game

4.A.promised B.promised to C.promises D.promising

5.A.some B.any C.other D.another

6.A.grain of rice B.rice of grain C.grain a D.rice

7.A.in B.for C.to D.of

8.A.three B.four C.third D.forth

9.A.number B.size C.rice D.amount

10.A.rest B.others C.number D.other

11.A.inside B.replace C.instead D.instead of

12.A.puted B.puts C.putting D.put

13.A.realized B.remembered C.completed D.surprised

14.A.if B.even C.though D.after

15.A.rice enough B.rice of enough C.enough rice D.enough of rice