manytimestheysucceededtheexperimentA.Havingtried;indoingB.Tried;inbeingdoneC.Havingtried;todoD.Tried;doing

Question

_____many times they succeeded _________ the experiment

1. A.
   Having tried; in doing
2. B.
   Tried; in being done
3. C.
   Having tried; to do
4. D.
   Tried; doing

_____many times they succeeded _________ the experiment

1. A.
   Having tried; in doing
2. B.
   Tried; in being done
3. C.
   Having tried; to do
4. D.
   Tried; doing

1. A.
   Having tried; in doing
2. B.
   Tried; in being done
3. C.
   Having tried; to do
4. D.
   Tried; doing

A.

Having tried; in doing

A.

Having tried; in doing

Having tried; in doing

B.

Tried; in being done

B.

Tried; in being done

Tried; in being done

C.

Having tried; to do

C.

Having tried; to do

Having tried; to do

D.

Tried; doing

D.

Tried; doing

Tried; doing

Answer 1

A考查非谓语动词。主语they与try之间是主动关系，故用现在分词。分词的动作发生在谓语动词之前，所以用现在分词的完成式，短语：succeed in doing sth 成功做成某事，句意：尝试了许多次之后，他们成功的做成了实验。所以选A。

A考查非谓语动词。主语they与try之间是主动关系，故用现在分词。分词的动作发生在谓语动词之前，所以用现在分词的完成式，短语：succeed in doing sth 成功做成某事，句意：尝试了许多次之后，他们成功的做成了实验。所以选A。