1) I’ve lost my book. I thing I…have left it at school. a) might b)may c)must d)could
2) You…have dropped it somewhere when you ran in the yard.
a) must b)might c)could d)must
3) It…not possibly have fallen out.
a) could b)might c)can d)must
4) The policeman who walked slowly along the street…have been very bored.
a) may b)might c)can d)must
5) The lighted window…not have interested him.
a) can b)could c)must d)might
6) I…have left my book on the table.
a)can b)could c)may d)might
7) He…have sent invitation earlier.
a) may b)might c)could d)must
8) He…have made such a mistake.
a) can b)must c)could d) might
9) John’s son…hot have got into trouble. I saw him save and alive.
a) could b)must c)may d)can
10) Where is N.? - He…be walking in the park.
a) can b)could c)must d)may
