Wewerebusy________(get)thingsreadyforthetrialproductionwhenhephonedus.
Themorewelookedatthepicture,________.
The director recommended that she ________ (study) more English before going abroad.
Hardlyhadhefinishedhisspeech________theaudiencestartedcheering.
Night________(fall),wehurriedhome.
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
