PRACTISE ONLINE!: UNIT 4 (PRESENT PERFECT-PAST SIMPLE, MAKE/DO)

MAKE/DO
http://www.learn-english-today.com/lessons/lesson_contents/exercises/make-do_quiz1.htm
PRESENT PERFECT-PAST SIMPLE
http://www.learn-english-today.com/lessons/lesson_contents/exercises/present-perf_past-simple-ex.htm
http://www.learn-english-today.com/lessons/lesson_contents/exercises/present-perf_past-simple_mistake-print-ex1-correction.htm
http://www.learn-english-today.com/lessons/lesson_contents/exercises/present-perf_past-simpl