The students can’t go home________they finish cleaning the classroom，for it’s their duty．
| A．when |
| B．since |
| C．if |
| D．until |
--- I can’t afford the white sweater. Can you show me another one?
--- What about the orange one? The price is a little ________.
| A．cheaper | B．higher | C．lower | D．more expensive |
The Slender West Lake ______ a long river named the Baozhang Lake.
| A．is used to be | B．used to being |
| C．used to be | D．is used to being |
--- How many students are there in your class? --- Forty，and ________ of us are girls.
| A．three fifths | B．three fifth | C．third five | D．third fifths |
I think we should give him another chance _______ he has made some mistakes.
| A．though | B．unless | C．if | D．until |
--- Have you decided which club to join?
--- Not yet. I __________ go to the Music Club.
| A．must | B．may | C．need | D．should |