I have been studying here for four years, by next summer I ________.
D
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Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Wooddoesnotconductelectricity;________.
Wewerebusy________(get)thingsreadyforthetrialproductionwhenhephonedus.
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
Heaskedmewhethermybrother________(fly)toBeijing.