Exercise 1 :
Cách làm : Was + He / She / It
                  Were  + We / You / They
                  Did luôn luôn phải có động từ thường đứng sau như : eat , drink , go , .......

1- Was Mandy at work yesterday ?
2- Where did they go  last Chirstmas ? 
3 - Did they go to Italy last month ?
4 - Did he play football yesterday ?
5- What film did Carol watch ?
6- What was the weather like ?
7- Was your dog in the garden ?
8- Why did you learn English ?
9- Who did she go on holiday with ?
10- Was the men at the cinema ?
11- Where did you buy this shirt ?
12 - Was your father at home ?
13 - Did her friends go to the party ?
14 - Where were the children yesterday ?  (giải thích : children là danh từ số nhiều của child)
15 - Was your TV  working yesterday ?
16- Did Frank do his homework ?
17 - Was there a Cafe at your hotel ?
18 - What time did Kate arrive ?
19 - When were you in Canada ?
20 - Did she have a cup of coffe ? 

Chúc tus hc tốt !!!!