They succeeded in killing pests which came from the foreign countries _____

 They succeeded in killing pests which came from the foreign countries ______ a lot of hard work.

#27138

according to

thanks to

in memory of

in addition of

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Mr Chen was ___ early thirthies when he went abroad to have his further studies.

#28789

of the

in the

in his

on his

No one helped me . I did it all _____ myself

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for

from

The last question in the maths test yesterday was far _____ me．I couldn’t work it out _____my own．

#25463

over , by

above, by

from, on

beyond, on

The doctor must be _______ 24 hours a day, 7 days a week in the boarding school.

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on call

by hand

in sight

on spot

The company, _____ him, is beginning to develop rapidly.

#28069

in the charge of

in charge of

in the control of

in control of

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