A. black B. trainer C. thermodynamics D. on the weekend A. brother B. vertical C. teach English D. speech A. electrode B. curtain C. Mr D. clerk A. aah B. inch C. horn D. instead A. during B. project C. to D. orderly A. wear B. cake C. down D. instruction A. How are you B. flood C. divide D. airmail A. old B. ammeter C. enemy D. nor A. two B. wizard C. less D. official A. don't B. nonsense C. see off D. manage to do