1. entrance

2. qualifications

3. achievement

4. do

5. to come

6. She told me to send her regard to my grandfather if I met him.

Chúc anh chị học tốt! (Chắc chắn đúng ạ)

Bạn tham khảo :

1. The  entrance  looked dark and there were hardly any other guests. (enter) 

2. you are never too old to go to college and gain some  qualifications ( some + N) (qualify)

3. My greates tachievement was graduating from university. (achieve)

4. We always (do) do  our exercises carefully. ( THTĐ  S ( số nhiều ) + V(nguyên thể ) 

5. Ask her (come)to come  in and don't keep her (stand) stand . 

6. If you meet your grandfather, please send my regard to him.⇒ She told me to send her regard to my grandfather if I met him.