There_______ a teacher and some students on the playground.
| A．are | B．is | C．has | D．have |
Teenagers should be allowed out on school nights.
| A． going | B．to go | C．gone | D．went |
Tim doesn’t study ____as his sister does .
| A．very hard | B．harder |
| C．so hard | D．hard enough |
Excuse me! Can you tell me____next?
| A． how to do | B．what should we do |
| C．what we should do | D．how we should do |
This book is ___hard ___understand.
| A． too ; to | B． such; to |
| C． too ; too | D． so ; that |
He go to school early, but now he goes to school late.
| A．is used to | B．used to |
| C． was used to | D． use to |