--My computer ____start, no matter how hard I try.--It might have crashed.

—Is John coming by train.—He should，but he ________ not.He likes driving his car.

According to the rules, students ______ get grades not lower than 85% in any subject in order to get the scholarship.

---Dad, must we wait until the light becomes green?---Yes,I’m afraid we      .That’s the traffic rule.

— When shall we meet your cousin at the station?— His plane took off two hours ago, and it        reach at 5 pm.