b for how many hours has mark been fishing?
d how many math problems have you done?
e how many pancakes does mom have?
f for how long has mom made pancakes?
g how many books has Mr Smith selled in 6 hours?
h how long has Mr Smith been selling books?
I how many movies has Lara watch this week?
j how long has Lara been watching movies?
k how many dresses has Simone made this month?
l for how long has Simone been making dresses?
m how many times did she visit Madam Tussaud's museum?
n for how long has she been visiting England?
