The Internet TESL Journal has tons of quizzes for student practice.
Unless otherwise indicated, these links connect you directly to quizzes on that site.

Low Beginning

Self Study Quizzes for ESL Students

Short Answers (Carlos Gontow)

Getting Acquainted Dialog (Vera Mello)

Getting Acquainted Dialog (Vera Mello)

High Beginning

Self Study Quizzes for ESL Students

34 Easy Questions (Charles Kelly)

Wh-Questions (Douglas Gilbert)

Question Formation (Vera Mello)

Question Formation II (Vera Mello)

Karin's ESL Partyland- The Quiz Center

At a Party: Personal Pronouns (multiple choice)

Making Dinner: Prepositions of Location (multiple choice)

Jerry and Ken Make Travel Plans: Prepositions of Time (multiple choice)

Girl Talk: And and But (multiple choice)

Low Intermediate

Self Study Quizzes for ESL Students

A Dentist Appointment (Vera Mello)

An Invitation (Vera Mello)

Dialog Reordering (Vera Mello)

Assorted Questions and Answers 1 (Vera Mello)

Assorted Questions and Answers 2 (Vera Mello)

Match the Sentences (Vera Mello)

Questions & Answers - Matching Quiz (Vera Mello)

Tag Questions (Barbara Lyons Perez)

Tag Questions (Barbara Donnelly)

Tag Questions Has he? Hasn't he? Had he? (Letitia Bradley)

Tag Questions Does she? Doesn't she? Did she? (Letitia Bradley)

Tag Questions Have you? Are you? Do you? (Letitia Bradley)

Tag Questions With 'Be'- Matching Quiz (Vera Mello)

Tag Questions With Assorted Verbs - Matching Quiz (Vera Mello)

Assorted Sentences (Vera Mello)

Adjectives Ending with -ed and -ing (Douglas Gilbert)

A Job Interview (Jim Schweizer)

Karin's ESL Partyland- The Quiz Center

Tense Review: At a Restaurant  (fill-in)

Guy Talk: Conditional Sentences (fill-in)

At the Bus Depot

Questions: At a Restaurant

Useful Expressions: At a Hotel

Questions: Clearing Customs

Useful Expressions: Smoking

High Intermediate

Self Study Quizzes for ESL Students

An Invitation (Vera Mello)

Advanced

Self Study Quizzes for ESL Students

Japan's Geography and Climate (Charles Kelly & Larry Kelly) Multiple-choice Reading Comprehension, Medium, 11 Questions.