1. Have you ever ______ with a group?

A. study       B. studying       C. studied     D. studies

2. I have trouble ________ the new words.

A. memorize   B. memorizing    C. to memorize  D. memorized

3.If you don’t know how to spell new words, look them _____ in dictionary.

A. up         B. for           C. after         D. with

4. The small boys decided ________ to each other.

A. not talk    B. not talking     C. not to talk    D. to not talk