It is said that sixty percent of all energy ________ in the world today is being lost as waste heat.

 It is said that sixty percent of all energy ________ in the world today is being lost as waste heat.

#88518

produced

producing

to produce

having produced

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 He told us whether           a meeting was still under discussion.

#95315

to have

having

have

had

Remind him ______ the window and door when he leaves.

#96978

of closing

closing

to close

He started to learn English in 1990 and in the years ________ he kept on using it in his work.

#97244

following

followed

that followed

He admitted ___away the purse____to him．

#95406

to have taken: not belonged

taking; not belonged

taking; not belonging

to have taken: not belonging

          in the river for five hours, the thief looked very pale and exhausted.

#94452

Having been trapped 　

Being trapped 　

Trapping

Having trapped

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