For your safety, you mustn’t get close to the train ________ it stops.
while
when
since
until
---- Have you ________ Tim to go with us'? ---- No. He wants to but he ________ care for his sister because his parents are busy.
---- What's your plan for your holiday?---- It ________ the weather! If ________ doesn't rain, I will go climbing.
---- Are you ________? ---- Sorry, I am ________. Could you please give me five more minutes?
---- ________ is the pair of trainer shoes? ---- It ________ me 200 yuan.
---- I don't ________ playing football. ---- Really? So what are you ________ in?