His parent did not know why ________ his homework.
A: did he not do
B: did he not to do
C: he had not done
D: he had done not
A: did he not do
B: did he not to do
C: he had not done
D: he had done not
举一反三
- What _____ Annie ______ by the time he was ten? A: did, do B: did, did C: has, done D: had, done
- He went on __________his homework in his room after supper A: to do B: did C: doing D: done
- What did Tom do last night A: He went to the party. B: He did his homework. C: He helped his mother do the housework.
- What ______ Jim ________ by the time he was seven？ A: did, do B: had, done C: have, done
- He knew what he had to do, and he got up and did it before he changed his ________.