They were very tired,but they went on with their work.(保持原意)
They carried on working though they were very tired
they were very tired .they didn't stop working towards their
They spend two hours on their work(保持意思不变)
they work hard,but their efforts are not very p------
They were very tired.they stoped__(work)__(have)a rest.
they spent all night ( )the work .so they were very tired in
() many difficulties,they still went on with their experimen
the children were very tired,they were____at 7 but now they
On his return to work,they were very glad.改错
They are very b----- with their lessons on w-----
They are very (b )with their lessons on (w ).
they felt very tired, but they kept on ( ) in the field.