The radiation amount of a mobile phone for two half-hour periods per day is equal to _____

The radiation amount of a mobile phone for two half-hour periods per day is equal to ______ to an X-ray for ten seconds.

#91571

expose

exposing

exposed

being exposed

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When I passed by, I heard her _____ in the room.

#95761

sings

sang

singing

to sing

When _________ where he had put the book, he kept silent.

#94787

ask

asking

to ask

asked

For breakfast he only drinks juice from fresh fruit ___ on his own farm.

#95605

being grown

grown

to be grown

to grow

    how to work out the difficult physics problem ,he asked the teacher for help .

#89838

Not to know

Not knowing

Knowing not

Not known

_____ her mother after being separated for 20 years, she couldn’t help, even though she tried not to, ______.

#94978

Seen, crying

To see, cry

Seeing , crying

Having seen, crying

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