From the ________ shown in the dead body, he ________to death by a certain poisonous chemical, but I can’t tell exactly which.
| A．symptoms; must have been poisoned | B．signs; should have been poisoned |
| C．symbols; could have been poisoned | D．appearances; may have been poisoned |
—Who has made a mess in my room?
—Who elseit but your naughty son?
| A．could do | B．could have done | C．did | D．has done |
If the prediction for the earthquake ________ more accurate, we would have been more prepared and many more lives would have been saved.
| A．had been | B．was | C．has been | D．were |
—Where is Bob? I cannot find him anywhere.
—Hehave been off long. I heard him make a call just now.
| A．shouldn’t | B．can’t | C．mustn’t | D．needn’t |
Class regulations require _____ is the last to leave the classroom _____ off all the lights.
| A．who; should turn | B．whom; shall turn |
| C．whomever; turns | D．whoever; turn |
What impresses me most is _________ he appears in front of others, he wears a sincere and charming smile.
A. which B. that C. whereC. that whenever