His father is __________ engineer and he works _________

His father is __________ engineer and he works __________ research.

#49406

an, on

an, with

the , on

a, with

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 Look _______ the girl. She looks _______ her sister.

#46793

at, at

like, like

after, like

at, like

Many people are waiting ____________ the bus at present.

#50413

for

The supermarket is ________ the park.

#48255

across to

across in

across from

across for

More and more people like to talk with their friends ______ sending messages on WECHAT(微信)

#48101

with

for

--Is your ball      the door ?  --No, it’s     the chair.

#47175

in, behind

of, on

behind, on

on, in

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