46.It’s just _______ bite. There is nothing to worry about.
A.a vessel B.a temple C.an insect D.an arbitrary
47.Jack is _______ of stealing the books from the library.
A.accused B.witnessed C.strained D.found
48.Metals expand when they are heated and _______ when cooled.
A. indicate B.eliminate C.conquer D.contract
49.In order to _______ a good knowledge of English, he gave up his job and went to study in an English school.
A.require B.inquire C.acquire D.address
50.He checked carefully to _______ the possible errors in his design.
A.eliminate B.exceed C.enlarge D.vibrate
46.C 47.A 48.D 49.C 50.A