题目

1.Only after a year ( ) to see the result of my experiment.A.I began B.I had begun C.have...
1.Only after a year ( ) to see the result of my experiment.
A.I began
B.I had begun
C.have I begun
D.did I begin
2.( ) in the fields for two hours,they took a rest.
A.Having worked
B.Working
C.Worked
D.Being worked
为什么
第一题c为什么不对

提问时间：2021-02-22

答案

1.D only引导的倒装句,
2. A took是过去时,要发生在之前的动作,完成时