What a pity! He isn’t here.

A. then

B. so

C. as

D. when

A. Maths is very difficult of all.

B. No subject is not as difficult as Maths.

C. Nothing is more difficult than Maths.

D. No subject is more difficult than Maths.

A. It’s for us to think about this matter carefully necessary.

B. To think about this matter carefully it necessary for us

C. for us to think about this matter carefully it’s necessary

D. it’s necessary for us to think about this matter

A. They used to going Hanoi at the weekends

B. they are used to go Hanoi at the weekends

C. They used to go to Hanoi at the weekends

D. They were used to Hanoi at the weekends

A. I am sorry for joining the army

B. I wish I were taller.

C. I am not tall enough, so I don’t want to join the army.

D. I wish I am taller to join the army.

A. at

B. for

C. on

D. since