Were you told ________to arrive at the train station？
Yes． The group leader said we would meet there at half past ten． （ ）
A．howB．whyC．whenD．where
Mum， I've signed for a big box by Future Express（快递）． What' s in it？
I'm not sure． It________ be a present from your brother． （ ）
A．mightB．mustC．shouldD．will
It has been much easier for me to go to work________ shared bikes appeared．
But they also caused plenty of problems．( )
A．sinceB．beforeC．unlessD．though
Who is the space scientist from Beijing？
The man______ white over there． He's of medium height.（ ）
A．withB．inC．orD．for
Johnny， it's noisy outside． Go and see what's going on．_____________．
I'm answering a call.（ ）
A．Just a minuteB．One more time
C．Let's goD．That's fine