1. Who ________ with you at the library?
was

were

2. My parents ________ both athletes.
was

were

3. John’s cousin ________ a professional basketball player.
was

were

4. It ________ a beautiful day yesterday.
was

were

5. We ________ upset that the teacher gave us lots of homework.
was

were

6. It ________ 4pm when I arrived home.
was

were

7. I ________ very proud of you.
was

were

`1,` was

`2,` were

`3,` was ( Sửa đề: Johns counsin `->` John's cousin) 

`4,` was

`5,` were

`6,` was

`7,` was

---------

`@`  QKĐ với động từ tobe:

(+) S+ was/were +Adj/ N/...

`***` Dùng động từ tobe là was với các chủ ngữ là I, she,he, it, danh từ số ít

`***` Dùng động từ tobe là were với các chủ ngữ còn lại

`1` "who" - số ít `->` was

`2` "My parents" - số nhiều `->` were

`3` "John's cousin" - số ít `->` was

`4` "It' - số ít `->` was

`5` "We" - số nhiều `->` were

`6` "It" - số ít `->` was

`7` "I" - số ít `->` was

`-` CT :

S + was/were + bổ ngữ

I + was

He/She/It/Tên riêng/N số ít + was

You/We/They/N số nhiều + were

$dykhanhh.$