—How many students are there in your school? —About_______ students, I think.
| A． two thousand | B．two thousands |
| C．two thousand of | D．two thousands of |
—The problem is too difficult，can you show me _____，Wang Le?
—Sure.
| A．what to work it out | B．what to work out it |
| C．how to work it out | D．how to work out it |
—What do you think of Ann?
—Ann is so careful that she always goes over her exercises to ______ there are no mistakes.
| A．look for | B．make sure | C．find out | D．think about |
—_____will your sister be back ?
—In about two hours.
| A．How | B．How often | C．How long | D．How soon |
—Please don’t touch that fish.It smells _______.
—OK，I won’t.
| A．bad | B．badly | C．good | D．well |
—People now can know what is happening in the world quickly.
—You’re right.With the help of computers，news can ___every corner of the world.
| A．get | B．reach | C．return | D．arrive |