关键语法
（1）He had a big fight________(with；of)his friend．
（2）They have to compete________(with；for)their classmates at school．
（3）They practice________(singing；to sing)every morning．
（4）At last he________(won；beat)the race．
（5）They won’t come back until they________(finish；will finish)that work．
（6）It’s time for us________(having；to have)a rest．
（7）After watching TV，they continued________(reads；to read)books．
（8）Kids should have time________(relaxing；to relax)and think for themselves．