Listen, a small number of students ______ in the classroom.
| A．talk | B．talks | C．is talking | D．are talking |
— I’m not going swimming tomorrow afternoon.
— ________. I have to clean up my bedroom.
| A．So am I | B．Neither am I | C．Neither I am | D．So I am |
— 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 |
The thing that matters is not whether you fail or not, ________ whether you try or not.
| A．and | B．or | C．so | D．but |
Lanzhou is the only capital city that the Yellow River, the second ________ river in China, passes through.。
| A．long | B．longest | C．longer | D．length |
Only when the work is done ________ be able to go back home.
| A．you have | B．you will | C．will you | D．have you |