Their house caught _________ fire and was soon burnt to ___________ ground.
A. a, a B. a, / C. the, / D. /, the
I don’t think it any good ______________ too many sweets.
A. to eat B. eating C. eaten D. to have eaten
---- Do you have any idea what Tom did yesterday afternoon?
---- I know he spent at least as much time playing football as he __________.
A. did writing B. wrote C. spent to write D. was writing
The shop manager always says to his assistants, “We can never be _______ polite to our customers.”
A. so B. enough C. too D. more
Mr. Wang made up his mind to devote all he could ____________ his oral English before going abroad.
A. improve B. to improve C. improving D. to improving
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