1 was written 

2 were made

3were broken

4 were built

5 was invented

6 was made

7was sent

8was -played

9was designed

10was stolen

1a 2c 3d 4c 5d

selfish-shares-kind-makes-funny

41 Last year, I spent my summer vacation with my family in New York.

42 You had better take a rest and stop drinking cold water

43. We didn't go for a picnic yesterday because it rained heavily.

44. My mother usually cycles to work because riding a bike is good for her health.

improvement

1d 2c 3c 4c 5a

cấu trúc by whom và who khác nhau, mình mới học về nó nên bạn nên xem kĩ coi có sai gì không nhé, còn khác thì mình nghĩ who nói về ai theo nghĩa chủ động(người), whom được hướng tới(hiểu theo kiểu người mà).

16a 17c 18c 19b 20d

1. Is the house being cleaned by Tim? 

2. By whom was the Pyramids built?

3. By whom was the kitchen window smashed ? 

4. When was the tree blown down by the wind  ? .

5. Who has to sign these papers? By whom has these papers have to be signed by? ( ko chắc)

6. Who is going to welcome the guests? 

Who are the guests going to be welcomed by? ( không chắc)