7.must have referred to

6must have had some idea 7must have referred to 8could have worked 9could have done better

11.we could have managered to finish
12.could not have imagined
13.must not have refered to
14.should not have attached
15.should have been asleep

1.must have missed
2.that you can think highly of
3.would not be so foolish
4.that all schools should purchase
5.need not have dressed up
6.must have ideaed
7.must refer to
8.could have worked
9.could have done better
10.should be more careful.

1. must have missed
2.that you can think highly of
3. wouldn't/couldn’t be so foolish
4.that all schools should purchase
5. needn’t have dressed up/needn’t have been dressed
6. must have had some idea
7. must have referred to
8.could have worked
9. could have done better
10.can’t be too careful
11.We could have managed (to finish/complete)
12. can/could never/not have imagined
13.can’t / couldn’t have referred to
14.need not have attached importance to
15.should have been slept

1. must have missed
2.that you can think highly of
3. wouldn't/couldn’t be so foolish
4.that all schools should purchase
5. needn’t have dressed up/needn’t have been dressed
6. must have had some idea
7. must have referred to
8.could have worked
9. could have done better
10.can’t be too careful
11.We could have managed (to finish/complete)
12. can/could never/not have imagined
13.can’t / couldn’t have referred to
14.need not have attached importance to
15.should have been slept