tests by here4u with the online test builder (650 tests)

541. May, Might, Should... what they mean... (24839 candidates)
542. Expressing Uncertainty : may-might-must... (21266 candidates)
543. When, While, Till etc, expressing time. (5699 candidates)
544. Whereas, Unless, Contrary to : contrasts (31853 candidates)
545. Like - As - and others... (3877 candidates)
546. Surprise...Surprise ! ... 2/2 (1121 candidates)
547. Surprise ...Surprise!... 1/2 (1674 candidates)
548. To sit or to sit down/ To stand or to stand up (2259 candidates)
549. Up and Down (2278 candidates)
550. Intention and refusal. (2389 candidates)
551. Agree or Disagree (13104 candidates)
552. How to make wishes... (5149 candidates)
553. Though/ in spite of ...Concession (43429 candidates)
554. How to express consequence (10271 candidates)
555. A/An - how to use (23630 candidates)
556. Direct and Indirect Interrogative forms ... (19212 candidates)
557. After, Afterwards and Then (18929 candidates)
558. Any and its compounds (7296 candidates)
559. Sleep- Sleepy- Asleep (1947 candidates)
560. Let's get married... (4219 candidates)