... a in comparison with the salary of a teacher b than a teacher c than that of a teacher d to compare as a teacher c Professional people expect you to call them when it is necessary ………………… an ... are tall a the b a c an d no article > d 54 Hoa is good pupil a the b a c an d no article > b 55 That is a bag It is on table a the b a c an d no article > a 56 We are in same class ... you have just had a cold a let b leave c want d need a 48 Most comets have two kinds of tails, one made up of dust, ……………… made up of electrically charged particles called plasma a one another...