He _a good job for our class this timeHe _____ a good job for our class this time.A.did doesB.does didC.did doD.do do

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He _a good job for our class this timeHe _____ a good job for our class this time.A.did doesB.does didC.did doD.do do
He _a good job for our class this time
He _____ a good job for our class this time.
A.did does
B.does did
C.did do
D.do do

He _a good job for our class this timeHe _____ a good job for our class this time.A.did doesB.does didC.did doD.do do
did在此处用作副词表示强调,同时须跟随主句而改变时态
后面所跟的动词只能用原形
选择did do
他这次真的为班级做了件好事

c 这次他对全班做了一件好事。
只有这个正确,其他的都错了,

C 正确
do ,did, does, 后面都要跟动词原形,当然,do 也是动词。同时又是助动词。
he did do a good job for our class this time, 意思是 这次他确实为班级做了点贡献(做了好事)
希望可以帮到你 :)