a, You can walk across the street here .
b, You must slow down
c, Can you drive a car ?
d, My sister can ride a bike but she can't drive a car
Chúc bạn học tốt 
a street/across/can/you/walk/here/the => You can walk across the street here.
b must/you/down/slow => You must slow down .
c you/car/can/ a/drive? => Can you drive a car ?
d can't/car/My sister/a/but/bike/drive/she/can/ride/a => My sister can ride a bike but she can't drive a car.
