They left at nine, so they ______ by now.
A: may arrive
B: B. must arrive
C: should have arrived
D: D. ought to arrive
A: may arrive
B: B. must arrive
C: should have arrived
D: D. ought to arrive
举一反三
- He （） in Japan as he left by boat last month. A: ought to arrive B: ought to have arrived C: should arrive D: must arrive
- -Did the train arrive in time?-No. It ______ two hours ago. A: must have arrived B: should have arrived C: may have arrived D: ought to arrive
- John left home twenty minutes ago. It is usually half an hour’s drive from his home to the office here. So he （） soon. A: should have arrived B: need arrive C: must have arrived D: may arrive
- He said the driver must have had an accident, otherwise he _____ by then. A: would arrive B: should arrive C: must have arrived D: would have arrived
- The policemen would have caught the murderer ________ a few minutes ealier. A: were they to arrive B: had they arrived C: if they were to arrive D: if they should arrive