He spent lots of time doing this experiment

11 .He spent lots of time doing this experiment.

= It took …………………………………………………………………………

12 .It took me all the morning to prepare for lunch.

= I spent ............................................................................................................

13 .Anna spent three days visiting VN.

= It took.........................................................................................................

14 .It took my son three years to study in this college.

= My son spent .............................................................................................

15. .I spend two hours doing my home work everyday.

= It takes ...........................................................................................................