He was ______ medical student before he turned _______ engineer.
A.a; an | B.the; the | C.a; / | D./; an |
custom
A.measure | B.upstairs | C.respect | D.sugar |
salt
A.almost | B.calm | C.chalk | D.half |
singer
A.single | B.language | C.stronger | D.bringing |
realize
A.pyramid | B.responsibly | C.whisper | D.title |
The book, ___________ is green, has been lent to my brother.
A.of which cover | B.the cover of which | C.whose covers | D.its cover |