— Look at the boy playing basketball on the ground. Is it George?
— It ________ be him. He told me he would play basketball after class, but he’s not sure.
A.mustn’t | B.must | C.can’t | D.may |
— Look at the boy playing basketball on the ground. Is it George?
— It ________ be him. He told me he would play basketball after class, but he’s not sure.
A.mustn’t | B.must | C.can’t | D.may |