A.he realized   
B.did he realize 
C.hehas realized   
D.has he realized

A.even though
B.in spite
C.no matter
D.contrary to

A.allow
B.allows 
C.is allowed 
D.are allowed

A.it was snowing hard 
B.hard it was snowing 
C.how it was snowing hard
D.how hard it was snowing

A.haven't seen
B.didn't see 
C.hadn't seen 
D.don't see

A.I miss you.
B.Fine. Thank you. And you? 
C.Are you OK? 
D.This way, please.

A.Fine, thank you. 
B.How are you? 
C.Nice to meet you, too. 
D.Thank you

A.is it 
B.isn't it
C.what's it 
D.isn't that

A.if
B.as soon as
C.until
D.or

A.I have  
B.have I  
C.I did  
D.did I

A.nor 
B.or
C.but 
D.and