When you are _______ about which button to press on the complicated machine, you can either read the user’s guide for guidance or fax us for specific instruction. Don’t ______ the trial-and-error method.
No sooner had I began to sing the English song than it was_______ by a 13-year-old girl. She sang the song so beautifully that I couldn’t help asking her when she had ______ the study of English.
Reviewing the video monitor afterwards, they noticed two armed men with their faces covered by masks step out of a carriage and ______the bank through the backdoor.