Bicycling is a good exercise;________ it does not pollute the air.
| A．besides | B．beside | C．therefore | D．otherwise |
Millie often helps Sandy _______ her Physics, and she also shares his school things _______ her.
| A．to, to | B．with, to |
| C．with, with | D．to, with |
China is one of ______ countries in the world.
| A．large | B．larger |
| C．largest | D．the largest |
Our monitor always helps other students ____ their lessons and he never says any bad words _____ others.
| A．in , with | B．to , about |
| C．with , about | D．with , to |
Students in the USA spendtime their homework than we do.
| A．little , to do | B．less, doing |
| C．little , doing | D．less , do |
Chinese students have _________ weeks ______the summer holiday than American students.
| A．more, on | B．fewer, on |
| C．more, off | D．less, off |