________________ a book in the library, enter a key word into the computer.
A. To find B. Find C. To write D. Write
Studying in groups is necessary _________________ you want to do well in school.
A. if B. until C. unless D. though
---Whose is the pencil box?
---It ____________ be Tom’s. Look at his name on the cover!
A. can B. may C. must D. need
Could you record the football game for me? I can’t watch ____________ later.
A. it B. one C. this D. that
Martha is a _______________ girl. She always smiles and says hello to others.
A. shy B. friendly C. crazy D. healthy
---______________ did you pay for the CD?
---Only nine dollars.
A. How many B. How much C. How long D. How often
