填空。把数字填入相应的括号内。

( ) one ( ) four ( ) two ( ) three ( ) six ( ) five ( ) seven ( ) ten ( ) eight ( ) nine

2 5 1 4 3 7 6 9 10 8

( ) twelve ( ) eleven ( ) thirteen ( ) fifteen ( ) fourteen ( ) twenty ( ) eighteen ( ) seventeen ( ) sixteen ( ) nineteen

15 12 11 13 14 17 16 18 19 20

one-1 four-4 two-2three-3 six-6five-5 seven-7 ten-10eight-8 nine-9 twelve-12 eleven-11
thirteen-13 fifteen-15 fourteen-14 twenty-20 eighteen-18 seventeen-17 sixteen-16nineteen-19