Mary can’t come to help us ____ she has to look after her mother at home.
A: because
B: how
C: where
A: because
B: how
C: where
举一反三
- Why can’t Helen come after class A: [A] Because she has to do cleaning. [B] Because she has to meet Bob. [C] Because she has to come home and look after her mother.
- Who should be helped A: She has to visit Bob. B: She has to do her homework. C: She has to look ’after her mother at home.
- Mary didn’t go to the party last night because she ______ the baby for her sister until 9:30. A: must have look after B: had to look after C: must look after D: has to look after
- Why can’t Sally play A: Because she doesn’t like to. B: Because she has to help her mother. C: Because she is having a party.
- The reason ____ he didn’t come to school yesterday is ____ he had to look after his sick mother at home.