We collected a lot of books to get the necessary information but only half _________helpful, so we failed to finish the work.

We collected a lot of books to get the necessary information but only half _________helpful, so we failed to finish the work.

#85971

are

was

were

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His “Selected Stories”＿＿＿＿＿first published in 1990．

#86264

were

was

has been

have been

I took mathematics and physics because I think that ________ very important for me to make further research in this field.

#86325

what is

they are

this

which are

 There        a desk and some chairs in my room. The desk is very nice.

#44063

are

has

have

The words that we should pay attention to_______on the blackboard.

#44136

is writing

being written

are written

writing

--  _________ you from Australia?   --No, I’m from Singapore.

#44107

Can

Are

Where’s

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