tests by here4u with the online test builder (669 tests)

541. Can't help or Prevent (3205 candidates)
542. Can/could/may... Must/have to... (27258 candidates)
543. Too much ... Much too... (8318 candidates)
544. May, Might, Should... what they mean... (24982 candidates)
545. Expressing Uncertainty : may-might-must... (21382 candidates)
546. When, While, Till etc, expressing time. (5739 candidates)
547. Whereas, Unless, Contrary to : contrasts (32199 candidates)
548. Like - As - and others... (3909 candidates)
549. Surprise...Surprise ! ... 2/2 (1124 candidates)
550. Surprise ...Surprise!... 1/2 (1679 candidates)
551. To sit or to sit down/ To stand or to stand up (2262 candidates)
552. Up and Down (2283 candidates)
553. Intention and refusal. (2393 candidates)
554. Agree or Disagree (13233 candidates)
555. How to make wishes... (5203 candidates)
556. Though/ in spite of ...Concession (43733 candidates)
557. How to express consequence (10287 candidates)
558. A/An - how to use (23665 candidates)
559. Direct and Indirect Interrogative forms ... (19320 candidates)
560. After, Afterwards and Then (19022 candidates)