41. The children should not stay up late 

-> The children ought to go to bed early

42. How high is the Big Ben Clock Tower? 

-> What is the height of  the Big Ben Clock Tower?  

43. How long is the Mekong River? 

-> What is the length of  the Mekong River?   

44. I haven’t seen her at this club before 

-> This is the first time I have seen her at this club 

45. Bill last called me five days ago 

-> Bill hasn’t called me for 5 days 

`41`. The children should not stay up late

`->` The children ought not to stay up late

`42.` How high is the Big Ben Clock Tower?

`->` What is the height of Big Ben Clock Tower?

`43.`  How long is the Mekong River?

`->` What is the length of the Mekong River.

`44`. I haven’t seen her at this club before

`->` This is the first time I have seen her.

`45.` Bill last called me five days ago

`->` Bill hasn’t called me for five days.

$@Pipimm~$