Hardly had he finished his speech ________ the audience started cheering.
A、andB
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he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.
Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.
This test ________ a number of multiple choice questions.
________ (fail) several times, they need some encouragement.
Howlong________they________(dig)theditch?
