The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.
| A．should | B．must | C．will | D．can |
People _____ much more by their gestures than by their words.
| A．give in | B．give out | C．give up | D．gave away |
Whoever leaves the lab last, _____ all the lights are turned off.
| A．make sure | B．make sure of | C．be sure | D．be sure of |
Nobody can tell _____ the future world will look like.
| A．how | B．what | C．when | D．where |
— I put him down for a well-educated man.
—______ ?
— I mean that he's a well-educated man.
| A．I beg your pardon | B．Speak louder, will you |
| C．What’s that | D．Will you repeat word for word |
The silence of the library is sometimes broken by a sudden cough or the sound of pages______.
| A．turning | B．turned | C．being turned | D．having turned |