--- Mr Wu, could you tell me ________?--- You’d better do more speaking.
---- Hurry up ! The bus is coming . ----- Wait a minute. Don’t cross the street_________ the traffic lights are green.
.---Tom plays computer games too much. --- That’s why his mother is __________ his eyesight.
--- Could you tell me ? --- His home is quite far away from the office, I think.
---Miss Li has taught ____ English for about 3 years.---You are lucky. ____ is a very good teacher.
---Do you like your maths teacher? ---Sure, because he is the teacher ___ helps me a lot.