★ Past Simple, Past Continuous, Past Perfect, Past Perfect Continuous
The planes _______ for about an hour and they _____ about 300 miles when something happened.
A. had flown / had been travelling
B. flew / were travelling
C. had been flying / had travelled
D. flew / travelled
Preview next quiz:
It is believed that the earthquake _____ their equipment.
A. was broking
B. had broken
C. had been breaking
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