A smile costs ， but gives so much．（ ）
A．somethingB．anythingC．nothingD．everything
What is the sentence pattern of "I love English．"？（ ）
A．S+VB．S+V+O．S+V+PD．S+V+O+OC
Which of the following is a traffic sign？（ ）
A．
B．
C．
D．
_____ useful the information you've provided is!（ ）
A．What aB．WhatC．What anD．How
I'm going out． I'll be back _____ an hour．（ ）
A．atB．onC．inD．from
Father was so busy with his work that he had _____ time to read the newspaper．（ ）
A．someB．littleC．muchD．a bit of