tests by here4u with the online test builder (628 tests)

501. Surprise ...Surprise!... 1/2 (1631 candidates)
502. To sit or to sit down/ To stand or to stand up (2196 candidates)
503. Up and Down (2141 candidates)
504. Intention and refusal. (2254 candidates)
505. Agree or Disagree (8820 candidates)
506. How to make wishes... (4994 candidates)
507. Though/ in spite of ...Concession (40242 candidates)
508. How to express consequence (9882 candidates)
509. A/An - how to use (22705 candidates)
510. Direct and Indirect Interrogative forms ... (18100 candidates)
511. After, Afterwards and Then (18015 candidates)
512. Any and its compounds (6953 candidates)
513. Sleep- Sleepy- Asleep (1892 candidates)
514. Let's get married... (4053 candidates)
515. What's your age? (4109 candidates)
516. Twice as much/As many as/ As much as (19310 candidates)
517. To like ... Like ... Likely ... (1464 candidates)
518. Far, Far from and others (1601 candidates)
519. To let - To leave (1418 candidates)
520. Ought to - Should (12333 candidates)