B. when was Albert Einstein born C. what they will do with the computers D. how often they go to movies
( )27---Could you tell me how long __the book?--Three days.
A.I can keep B.can I borrow C.I can borrow D. can I keep
( )28.I can’t understand ___the boy alone at home.
A.why she left B.did she leave C.why had she left D.why she leave
( )29. You will not succeeded if you ______ harder. A. will work B. won’t work C. work D. don’t work
( )30.Write clearly __your teacher can understand you correctly. A.since B.for C.because Dso that
( )31.______he failed , he went on doing the experiment .A. Even B. Yet C. Although D. in spite of
( )32.The dog went out while we __ supper. A. had B. had had C. were having D. would have
( )33.His brother has worked there ________ he left schoo A.when B. after C. since D. until
( )34.The boy didn’t stop talking ____the second bell rang. A.when B. until C. after D. because
( )35. __I came into the office, the teacher were having a meeting.A.While B. When C. Once D. Since
( )36.I was about to leave my house __ the telephone rang. A.while B. as C. when D. since