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 begin2.( ) in the fields for two hours,they took a r

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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 begin2.( ) in the fields for two hours,they took a r

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 begin2.( ) in the fields for two hours,they took a r
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

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 begin2.( ) in the fields for two hours,they took a r
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

D, B
第一句是倒装句,正常是:I began to see the result of my experiment only after a year.
意思是:一年之后我才开始看到试验的成果。
第二句的意思是:在地里走了两个小时,他们休息了一会。

C 副词在句首,要倒装AB不对 D时态错误
A for two hours是完成时的信号词

1. D after a year 用一般过去式
2. A