Tom was ______ that he couldn’t understand ______ difficult sentence.
| A．so a stupid boy; such | B．a so stupid boy; a such |
| C．so stupid a boy; a such | D．so stupid a boy; such a |
--- Who is the girl standing over there?
--- Well, if you ______ know, her name is Mabel.
| A．may | B．can | C．must | D．shall |
Children under 12 years of age in that country _____ be under adult supervision when in a public library.
| A．must | B．may | C．can | D．need |
--- Isn't that Ann's husband over there?
--- No, it ______ be him---I'm sure he doesn't wear glasses.
| A．can't | B．must not | C．won't | D．may not |
Mr White____at 8:30 for the meeting, but he didn't show up.
| A．should have arrived | B．should arrive | C．should have had arrived | D．should be arriving |
I often see lights in that empty house. Do you think I ______ report it to the police?
| A．should | B．may | C．will | D．can |