Simple or Compound?
www.quia.com/quiz/242899.html?AP_rand=1578676192

Compound Sentence Quiz:
webschool.wash.k12.ut.us/language/lessons/compoundsentences.html

Sentence Type Quiz:
grammar.ccc.commnet.edu/grammar/cgi-shl/quiz.pl/sentence_types_quiz.htm

(also, try quizzes 19, 23, 59, 60, and 80 for more practice)

Simple, Compound, or Run-On?
www.glencoe.com/sec/writerschoice/rws/mslessons/grade6/lesson16/index.shtml