A	B	C	D	E	F	G	H	I	J	
1	At the moment I'm...	How long have you...	When do you think they'll...	What time are you...	If they are...	If everyone could...	What...   ...on Sunday?	They might be...	The building is going to be...	If you had...	
2	How often does...	Have you had...	I'll...	Have they...	If you had...	What would you do if...	If..  ...will you go?	The work will be...	Do you think I should...	When was the last time...	
3	Who did you...	When are you...	What will you do if...	Do you think it'll...	...for ten years.	If I were...	It may have...	I must...	That's the shop...	How many times have...	
4	I hardly ever...	....yet?	....tomorrow evening?	She's forever...	He's... while his flat is being...	He's been...	These keys were left...	Are you doing...	It can't have...	Where's the book that...	
5	Who gave...	I've never...	What do you think you'll...	The rubbish is collected...	If you see...	If he doesn't...	Three men were...	If...  ....would you accept?	Do you have to...	What were you doing...	
6	What did she..	Have you ever...	......every two or three weeks.	As I was walking ...	She's gone...	Tomorrow morning he's...	He must be...	You're getting...	You're supposed to...	It looks like it's going to...	
7	I was having  lunch...	Did you...	What are you going...	This camera was made...	Watch out! Someone's...	She's already...	I doubt I...	She can't have...	That's the man who	What have you done with...	
8	Who lives...	What have you...	I haven't seen...	I had just...	Oh look. They've...	You will be met...	She can't be..	While I was...	He must have been...	Why aren't you...	
9	How long did...	You're always...	I expect I...	Since I...	My flat is being...	She's been taken...	It could be...	You ought to...	That's the house...	Where has he been...	
10	Who do you...	Are you going to...	Many cars are made...	Does your sister...	It was built...	......if she calls you?	The office has been...	You don't have to...	That's the woman whose...	How long were you...