The director recommended that she ________ (study) more English before going abroad.
study
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Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
A great number of small power stations ________ (set up) in their county since liberation.
Hotmetal________asitgrowscooler.
How long ________ they ________ (dig) the ditch?
Herefusedtotelluswhetherhe________(undertake)thejob.