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【单选题】
They have no idea at all ___.

where he has gone
where did he go
which place has he gone
where has he gone
【单选题】
I have no idea _____ to make my speech interesting.

how
why
when
what
【单选题】
The children all have very different( ) .

personalities
persons
private
humans
【单选题】
The old couple, whose kids have all passed away, have to ( ) only with their small pensions.

get at
get to
get by
get through
【单选题】
All things ____, the planned trip will have to be called off.

considered
be considered
considering
having considered
【单选题】
You look _______. Did you have a rest all night?

tire
tired
tiring
【单选题】
With the rapid development of the economy, all ( ) of our life have changed.

filed
fileds
aspect
aspects
【单选题】
All people, [] they are old or young, have been trying their best to help those in need.

even if
whether
no matter
however
【单选题】
I’ m going to do all I can to____ the unpleasant impression you have of me.

move
remove
shift
transform
【单选题】
The millions of calculations involved, ____ by hand, would have lost all practical value by the time they were finished.

had they been done
they had been done
having been done
they were done