– Is your brother playing computer games, Nick? – He ________ do that because the computer doesn’t work.A. mustn’t B. shouldn’t C. can’t
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--- It shouldn’t take long to clear up after the get-together if we all volunteer to help . ----- I quite agree with you . _____________.
The boy is ________ to greet us every morning .
--How long has Robert _______? ---Since 2000.
What do you usually use your computer _________ ?