Here are links to online assessments for simple, compound, complex, and compound/complex sentences. These will give you more practice!

http://grammar.ccc.commnet.edu/grammar/cgi-shl/quiz.pl/sentence_types_quiz.htm

http://highered.mheducation.com/sites/0073511994/student_view0/brush_up/part_i-grammar2/grammar_exercise_04.html

http://www.proprofs.com/quiz-school/quizshow.php?title=sentence-structure-simple-compound-complex-compoundcomplex-sentences&q=1