Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
E is the right answer.
This is the case of Idiom, Subject verb agreement.
Since discoveries were made during excavation and not at excavation. So choice B and C are wrong. Choice A is wrong clause 'that...the excavation' is not the right subject for verb has. Choice D is wrong for using 'excavating'.
A. That twenty-one ceramic dog figurines were discovered during the excavating
B. Twenty-one ceramic dog figurines discovered at the excavation
C. Discovering twenty-one ceramic dog figurines at the excavating
D. Ceramic dog figurines, twenty-one of which were discovered during excavating
E. The discovery of twenty-one ceramic dog figurines during the excavation